Pipette appointment. Pipettes are a simple but commonly used measuring instrument. Examples of the use of the word pipette in the literature

It is not known for certain who thought of it first. smoke through a pipette, and we are also unlikely to be able to establish the exact date of the first such experiment. This method fits perfectly under the phrase "Everything ingenious is simple." After all, what is a pipette and why is it perfect for the role of a device for using marijuana almost anyone can figure it out.

Just by looking at its design, you can already imagine how to smoke weed through a pipette. A glass tube, at the end of which there is a rubber cap - a simple device, is sold in every pharmacy. main destination this tool- instill drugs of a nasal type. They are still made according to Soviet technology from cheap raw materials and by the simplest methods, in principle, this thing does not need any modernization and is unlikely to need it in the near future.

We share this material without ulterior motives. There is no clear instruction or call for any action in the text! We are just trying to describe in an introductory tone how to smoke marijuana through a pipette and provide information of an informative nature. We also want to strongly note that using such methods one should be extremely careful so as not to harm oneself.

It can be said for sure that the beginning of the 21st century, just the period of the rapidly growing popularity of growing, was also marked by the fact that it became very fashionable to smoke cannabis through a pipette.

Today, the pipette for smoking marijuana is found under different names, such as:

• Russian style;
• One-hit pipes.

And thanks to our material, you can understand why.

Some of the old school assure : the pipette was used for this purpose as early as the 80 's ! Again, no one can say for certain when the pipette gained a new wave of popularity in Eastern Europe, only in a different area. Many claim that the pipette is a descendant of the evaporator lamp. With the help of such a light bulb, cannabis and other psychoactive substances were used.

Despite the fact that this method of using cannabis is closely associated with the drug culture of the states, for the first time they started smoking cannabis through a pipette not in the USA! Back in the 1960s, the pipette was a popular tool among DMT makers. It was used in the process of extraction of this substance. However , unlike a bong , a hook and a vaporizer , the pipette , with its uncomplicated design , gained first authority among cannabists not in the states , but in the expanses of the USSR . Paradoxically, yes, but even today in the West this way of smoking cannabis is called russia-style or smoke like a russian. Therefore, most theorists agree that for the first time it was in the Soviets that they began to smoke correctly through a pipette.

Howdopipetteforsmokingherbs?

Simple and concise

Regarding the use and manufacture of a pipette for smoking, everything is extremely simple here. If someone told you how to smoke tobacco through a pipette, then this way marijuana use is no different. Through a short glass tube, a person inhales the smoke coming from the burned marijuana. Many who have not heard anything about this method will shrug their shoulders in confusion. No, you don't have to make up anything, smoke marijuana buds or even smoke hashish through a pipette - it's as easy as boiling a cup of water. After all, the main and only difference between a pipette and a classic smoking pipe lies in the shape of the device itself. The attached mouthpiece and spring in the pipette prevent burns from heated hot glass.

The one hit pipes industry continues to grow

The finished device is a standard pipette purchased at any pharmacy in your city. With its narrow end, it is attached to a rubber cap (the same mouthpiece with a spring from a pen or a wire inside). The cap should have a cut off tip. O performance such uncomplicated devices should not be judged biased. The effectiveness of the pipette for smoking marijuana leaves nothing to be desired. Any cannabis lover who has used this method at least once will tell you that one puff is enough for a deep and powerful effect.

You can believe or not believe this statement, but the practice speaks for itself. This is not from science fiction, even for quite an inveterate smoker during the first use of a pipette, one puff is enough. It is this amazing level of efficiency that motivates many to buy or make a pipette for smoking hash, buds and plan.

Such guys as Everyone Does It and Near Dark have settled quite firmly on the market, offering customers original handmade masterpieces: colorful, multi-colored handmade pipettes for smoking marijuana. The code name for these devices is a tube for one breath ( one - hit pipes), which is quite consistent with reality.

smokegrassthroughpipette: Benefitsandlimitations

These are the works of art!

This method has no precisely designed and proven dangerous shortcomings. There are only guesses and assumptions, which we will share. Many believe that the smoke and air, when heated, do not have time to cool enough, because they pass through a very thin tube, so there is a possibility that they burn the lungs of a person. Therefore, with the frequent use of the pipette method, a significant amount of damage is applied to the human body. harm from internal burns. Also, the wire or spring filter that filters the ash may release toxic substances when heated. Again, no evidence is available, for the reason that no one has done scientific experiments with this method.

Such devices for smoking marijuana stand out for their versatility and therefore are often used by consumers in a set with other devices: a bong and a cigarette holder. And to tell the truth, the pipetting method of using marijuana is effective, affordable and extremely popular today. Both in the West and in the East, cannabis lovers widely use this device, which encourages hand-made stores to offer the market a variety of one-hit pipes of various colors, shapes and sizes. And in turn , such production in the market finds the buyer .

Yes, there are advantages to this method of use, but still it is impossible to recommend smoking through a pipette to everyone. to the townsfolk in a row. It's easy argue the fact that the slightest negligence can lead to dangerous consequences. For example, a shard from a glass pipe can pass through not very reliable filtration and damage the smoker's internal organs. To be afraid of wolves - do not go into the forest. Here is the choice and a responsibility each . This method enjoys wide demand and safe credibility among cannabis users due to the vigilance and caution of those who use it. . And you should not break such a trend without leaving the rays of care of the understanding Jah. After all

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First of all, it is a responsibility to oneself.

Traditionally, pipettes were made of glass; recently, a variety of polymeric materials have been increasingly used.

Medical pipettes

The most common infusion pipettes medicines in the form of drops (in the eyes, nose or ears). Such pipettes consist of a segment of a glass tube, one of the ends of the tube, strongly melted or drawn, has a small hole, and the other is closed with a flexible rubber (or polymer) container (tube, ball) and is designed to draw liquid into the pipette by suction.

In medical microbiology, there is also a special device - the Pasteur pipette (Pasteur pipette).

Volumetric pipettes for chemical and biochemical research

Most often, this is a glass vessel used for accurate measurement (dosing) of the volume of liquid.

They produce different types of volumetric pipettes for a variety of purposes, with different accuracy classes and for different volumes.

Traditional glass pipettes for analytical chemistry come in two types:

• Mora pipette(ungraded), for a given volume(1, 5, 10, 20, 50, 100, 200 ml, etc.) Mora pipettes have one circular mark in the upper part and are designed for sampling liquids of a certain volume. Such pipettes usually provide a smaller measurement error than graduated pipettes. GOST 29169-91 defines the permissible errors of pipettes. The error depends on the measured volume, so a pipette with a capacity of 25 ml has an allowable measurement error of 25 ± 0.06 ml.
• graduated(usually cylindrical, 1, 2, 10 ml, etc.) For example, 5 ml pipettes are usually graduated in 0.5 ml. Graduated pipettes allow volume measurements, usually with an accuracy of ± 0.1 or 0.2 ml.

Single-marked Mohr pipettes are sometimes referred to as aliquot pipettes.

gas pipettes

Special pipettes

Rules for using glass pipettes

Pipettes are calibrated for free flow of liquid. You should not blow out or quickly squeeze out the liquid - in the first case, an excess volume will come out of the pipette, which should remain in its nose due to capillary forces, and in the second case, due to the effect of leakage, the volume of the leaked liquid will be less than the standard one.

Pipette calibration and dosing accuracy

Major manufacturers

• RAININ

see also

Write a review on the article "Pipette"

Notes

Links

Chemical laboratory equipment Glassware Separation equipment Measuring Various equipment Safety

An excerpt characterizing Pipette

In the movement of the Russian army from Tarutino to Krasnoye, fifty thousand sick and backward left, that is, a number equal to the population of a large provincial city. Half of the people dropped out of the army without fighting.
And about this period of the campaign, when the troops without boots and coats, with incomplete provisions, without vodka, spend the night for months in the snow and at fifteen degrees of frost; when the day is only seven and eight hours, and the rest is night, during which there can be no influence of discipline; when, unlike in a battle, for a few hours only people are brought into the region of death, where there is no longer discipline, but when people live for months, every minute fighting death from hunger and cold; when half the army dies in a month - historians tell us about this period of the campaign, how Miloradovich had to make a flank march there, and Tormasov there, and how Chichagov had to move there (move above the knee in the snow), and how he knocked over and cut off, etc., etc.
The Russians, half-dying, did everything that could be done and should have been done to achieve a goal worthy of the people, and they are not to blame for the fact that other Russian people, sitting in warm rooms, intended to do what was impossible.
All this strange, now incomprehensible contradiction of the fact with the description of history occurs only because the historians who wrote about this event wrote the history of the beautiful feelings and words of various generals, and not the history of events.
For them, the words of Miloradovich, the awards that this and that general received, and their assumptions seem very entertaining; and the question of those fifty thousand who remained in hospitals and graves does not even interest them, because it is not subject to their study.
Meanwhile, one has only to turn away from the study of reports and master plans, but to delve into the movement of those hundreds of thousands of people who took a direct, direct part in the event, and all the questions that previously seemed insoluble, suddenly, with extraordinary ease and simplicity, receive an undoubted solution.
The goal of cutting off Napoleon with an army never existed except in the imagination of a dozen people. It could not exist because it was meaningless and it was impossible to achieve it.
The goal of the people was one: to clear their land from invasion. This goal was achieved, firstly, by itself, since the French fled, and therefore it was only necessary not to stop this movement. Secondly, this goal was achieved by the actions of the people's war, which destroyed the French, and, thirdly, by the fact that a large Russian army followed the French, ready to use force if the French movement was stopped.
The Russian army had to act like a whip on a running animal. And an experienced driver knew that it was most advantageous to keep the whip raised, threatening them, and not to whip a running animal on the head.

When a person sees a dying animal, horror seizes him: what he himself is - his essence, is obviously destroyed in his eyes - ceases to be. But when a dying person is a person, and a loved one is felt, then, in addition to the horror of the annihilation of life, one feels a rupture and a spiritual wound, which, like a physical wound, sometimes kills, sometimes heals, but always hurts and is afraid of an external irritating touch.
After the death of Prince Andrei, Natasha and Princess Mary felt this in the same way. They, morally bent over and screwed up from the formidable cloud of death hanging over them, did not dare to look into the face of life. They carefully guarded their open wounds from offensive, painful touches. Everything: a carriage passing quickly down the street, a reminder of dinner, a girl's question about a dress that needs to be prepared; even worse, a word of insincere, weak sympathy painfully irritated the wound, seemed like an insult and broke that necessary silence in which they both tried to listen to the terrible, strict chorus that was still unsilent in their imagination, and prevented them from peering into those mysterious endless distances that opened up for a moment. In front of them.
Only the two of them were not insulting and did not hurt. They spoke little among themselves. If they spoke, then about the most insignificant subjects. Both of them equally avoided mentioning anything related to the future.
To admit the possibility of the future seemed to them an insult to his memory. Even more cautiously, in their conversations, they avoided everything that could be related to the deceased. It seemed to them that what they experienced and felt could not be expressed in words. It seemed to them that any mention in words of the details of his life violated the greatness and sanctity of the sacrament accomplished in their eyes.
The incessant abstinence of speech, the constant diligent circumvention of everything that could lead to a word about him: these stops from different sides on the border of what could not be said, exposed even more clearly and more clearly to their imagination what they felt.

But pure, complete sadness is just as impossible as pure and complete joy. Princess Mary, in her position as one independent mistress of her fate, guardian and tutor of her nephew, was the first to be called to life from that world of sadness in which she lived for the first two weeks. She received letters from relatives that had to be answered; the room in which Nikolenka was placed was damp, and he began to cough. Alpatych arrived in Yaroslavl with reports on affairs and with proposals and advice to move to Moscow to the Vzdvizhensky House, which remained intact and required only minor repairs. Life did not stop, and it was necessary to live. No matter how hard it was for Princess Mary to leave that world of solitary contemplation in which she had lived until now, no matter how pitiful and as if ashamed to leave Natasha alone, the cares of life demanded her participation, and she involuntarily gave herself to them. She settled accounts with Alpatych, consulted with Desal about her nephew and made arrangements and preparations for her move to Moscow.

Pipettes are glass tubes of various diameters. Pipettes can be both straight and with an extension in the middle, which can be of three types: cylindrical, spherical, pear-shaped.

Types of pipettes:

1) a pipette with an extension and a label, called the Mohr pipette;

2) a pipette graduated to full drain and equipped with a canonical end;

3) pipette, graduated to full drain, with a flat end;

4) pipette, graduated to partial discharge with a canonical or flat end;

5) blown pipettes.

The graduated pipette was created by the German chemist and pharmacist Karl Friedrich Mohr (1806-1879). Such pipettes are used to partially drain a set amount of liquid. The unit of volume is cm3 or ml.

Graduated pipettes are classified into two accuracy classes:

1) class A is assigned to high-level pipettes, the marginal error is several times less than the minimum scale division value;

2) class B has low-level pipettes, while the marginal error in measuring the volume must be less than the minimum scale division value, for example, 0.01 ml for 1 ml pipettes and 0.2 ml, respectively, for 5 ml pipettes.

The type of pipette also determines where the liquid is poured from the pipette, this can be done from the zero line at the top to any graduation line. In other cases, pouring is carried out from any graduation line to the spout. The top of the pipette without fail creates a right angle with the axis of the pipette, defects on it are excluded, since they can interfere with the precise setting of the meniscus with a finger. The lower part of the pipette is a pouring spout in the form of a smooth cone. To establish the liquid meniscus, it is necessary to create a coincidence of the plane of the upper edge or the center of the graduation line with the lower point of the meniscus itself. To eliminate or at least reduce them to a minimum, one method of setting the meniscus is used to study the initial and final values. The installation of the descending meniscus is done in a certain way: a clean pipette is taken, which is held in a vertical position, it is filled with liquid, which should be about a few millimeters above the graduation line, and the meniscus is set on this line. To remove a drop that may remain on the pipette tip, a glass vessel is used, as a result of touching it with the end of the pipette, the drop is removed. From the pipette, the liquid is poured into a glass vessel, fixed in a slightly tilted state, while the tip of the spout should touch the inner surface of this vessel. The pipette and vessel do not move during the pouring procedure. The pouring time for 10 ml pipettes is determined in 10 s, for 5 ml pipettes it should not be more than 1 s. In the case where the pipette is not provided with a dripping timeout indication, it is not necessary to wait for the complete drainage of the liquid, which may remain on the walls. For complete pouring to the spout, the waiting time is 3 s. In the case where a waiting time is specified, for example 15 s, the pouring stops at the position of the meniscus above the graduation line by a few millimeters. The meniscus is finally fixed after 15 s on the graduation line. If pouring is performed completely up to the spout, then it is held for 15 s until the pipette is removed from the receiving vessel. For blow-out pipettes, be sure to blow the last drop out of the spout.

The high-precision pipette is used for serial pipetting of various volumes - 12.5 µl, 25 µl, 50 µl. The dropping accuracy for pipettes of this type is ± 2.0% for 12.5 μl, ± 1.5% for 5 μl, ± 1.5% for 50 μl. These pipettes are easy to use, suitable for use by both right-handers and left-handers. Equipped with disposable tips and tip ejectors.

They are used to accurately measure the set volume of liquid, as well as to transfer liquid from one vessel to another. Pipettes are designated by a certain sequence of numbers, between which hyphens are placed. The numbers carry certain information: type of pipette - execution - accuracy class - volume (for example, 1-2-5-10). Pipettes must be calibrated for pouring, the accuracy must correspond to a certain pattern standard. Also on the pipettes, the temperatures at which the pipette was calibrated, the designation for pouring the indicated container and the waiting time, if it is set, the limits of errors in measuring the volume, can be indicated.

Types of pipettes

Traditionally, pipettes were made of glass; recently, a variety of polymeric materials have been increasingly used.

Medical pipettes

The most common pipettes for infusion of drugs in the form of drops (in the eyes, nose or ears). Such pipettes consist of a segment of a glass tube, one of the ends of the tube, strongly melted or drawn, has a small hole, and the other is closed with a flexible rubber (or polymer) container (tube, ball) and is designed to draw liquid into the pipette by suction.

In medical microbiology, there is also a special device - the Pasteur pipette (Pasteur pipette).

Volumetric pipettes for chemical and biochemical research

Manual micropipette

Most often, this is a glass vessel used to accurately measure (dosing) the volume of liquid.

They produce different types of volumetric pipettes for a variety of purposes, with different accuracy classes and for different volumes.

Traditional glass pipettes for analytical chemistry come in two types:

• Mora pipette(ungraded), for a given volume(1, 5, 10, 20, 50, 100, 200 ml, etc.) Mohr pipettes have one circular mark in the upper part and are designed for sampling liquids of a certain volume. Such pipettes usually provide a smaller measurement error than graduated pipettes. GOST 29169-91 defines the permissible errors of pipettes. The error depends on the measured volume, so a pipette with a capacity of 25 ml has an allowable measurement error of 25 ± 0.06 ml.

• graduated(usually cylindrical, 1, 2, 10 ml, etc.) For example, 5 ml pipettes are usually graduated in 0.5 ml. Graduated pipettes allow volume measurements, usually with an accuracy of ± 0.1 or 0.2 ml.

Single-marked Mohr pipettes are sometimes referred to as aliquot pipettes.

In the laboratory practice of the USSR until the middle of the 20th century, liquid was taken into chemical pipettes most often by sucking in the mouth, which led to numerous accidents and injuries. Since the end of the 20th century, everyone has been taught how to fill pipettes (even with harmless liquids) using a rubber or PVC bulb. Unfortunately, more convenient devices are used less often (rubber bulbs with a valve, mechanical level fillers, electronic pipette guns).

Micropipettes

Oxford Single Channel Pipettes

Micropipettes by Gilson

Micropipettes are the most accurate and high-quality instruments for measuring small volumes of liquid (1-1000 μl (μl). They are widely used in biology and chemistry.

In the XIX-XX centuries. glass micropipettes were a graduated glass capillary with a conical nose.

For modern pipettes of simple design with dry-type seals, after a short dosing of concentrated acids or aggressive solutions, it is enough to disassemble the pipette, inspect and rinse the components (piston, tube and piston seals) with distilled water. Dry all parts thoroughly and collect the pipette. Prolonged exposure to corrosive vapors can lead to premature seal wear and piston damage. The impact of aggressive vapors on the internal elements of the dispenser is reduced if tips with anti-aerosol filters are used. Pipette designs from a number of manufacturers include a safety filter at the junction with the tip.

gas pipettes

Special pipettes

Rules for using glass pipettes

Pipettes are calibrated for free flow of liquid. You should not blow out or quickly squeeze out the liquid - in the first case, an excess volume will come out of the pipette, which should remain in its nose due to capillary forces, and in the second case, due to the effect of leakage, the volume of the leaked liquid will be less than the standard one.

Pipette calibration and dosing accuracy

Like other measuring instruments, pipettes must be calibrated at the time of manufacture and subjected to periodic verification.

Major manufacturers

• RAININ in Russia

see also

• Volumetric flask
• Measuring cylinder
• Purka

Notes

External links

• Helpful Hints on the Use of a Volumetric Pipet by Oliver Seely

Wikimedia Foundation. 2010 .

Synonyms:

• Cities of Zug
• Wabo

Synonym dictionary

PIPETTE- PIPETTE, and, wives. Glass tube with a rubber cap for measuring liquid drop by drop, dropper (in 3 values). P. for eye drops. Drop with a pipette. | adj. pipette, oh, oh. Dictionary Ozhegov. S.I. Ozhegov, N.Yu. Shvedova. 1949 ... Explanatory dictionary of Ozhegov

pipette- — Themes Oil and gas industry EN pipet … Technical Translator's Handbook

pipette- I. PIPETTE and, w. pipette f. 1. A small glass tube with a rubber tip for collecting, drawing in liquid and releasing it in drops. ALS 1. Any man will be able to adapt fountain pens that do not write, pipettes that ... ... Historical dictionary gallicisms of the Russian language- pipetė statusas T sritis Standartizacija ir metrologija apibrėžtis Stiklinis vamzdelis su ant vieno galo užmautu guminiu ar plastikiniu gaubtuku. Vartojamas skysciams įsiurbti, lašinti arba dujoms praleisti. atitikmenys: engl. pipet; pipette wok … Penkiakalbis aiskinamasis metrologijos terminų žodynas

With a tube having an end (tip, tip, spout) with a small hole to limit the rate of fluid outflow.

A variety of pipettes are widely used for measuring precise volumes of liquids or gases, in medicine, chemistry and biology, and especially widely in analytical chemistry and biochemistry.

Types of pipettes

Traditionally, pipettes were made of glass; recently, a variety of polymeric materials have been increasingly used.

Medical pipettes

The most common pipettes for infusion of drugs in the form of drops (in the eyes, nose or ears). Such pipettes consist of a segment of a glass tube, one of the ends of the tube, strongly melted or drawn, has a small hole, and the other is closed with a flexible rubber (or polymer) container (tube, ball) and is designed to draw liquid into the pipette by suction.

In medical microbiology, there is also a special device - the Pasteur pipette (Pasteur pipette).

Volumetric pipettes for chemical and biochemical research

Manual micropipette

Most often, this is a glass vessel used for accurate measurement (dosing) of the volume of liquid.

They produce different types of volumetric pipettes for a variety of purposes, with different accuracy classes and for different volumes.

Traditional glass pipettes for analytical chemistry come in two types:

• Mora pipette(ungraded), for a given volume(1, 5, 10, 20, 50, 100, 200 ml, etc.) Mora pipettes have one circular mark in the upper part and are designed for sampling liquids of a certain volume. Such pipettes usually provide a smaller measurement error than graduated pipettes. GOST 29169-91 defines the permissible errors of pipettes. The error depends on the measured volume, so a pipette with a capacity of 25 ml has an allowable measurement error of 25 ± 0.06 ml.
• graduated(usually cylindrical, 1, 2, 10 ml, etc.) For example, 5 ml pipettes are usually graduated in 0.5 ml. Graduated pipettes allow volume measurements, usually with an accuracy of ± 0.1 or 0.2 ml.

Single-marked Mohr pipettes are sometimes referred to as aliquot pipettes.

gas pipettes

Special pipettes

Rules for using glass pipettes

Pipettes are calibrated for free flow of liquid. You should not blow out or quickly squeeze out the liquid - in the first case, an excess volume will come out of the pipette, which should remain in its nose due to capillary forces, and in the second case, due to the effect of leakage, the volume of the leaked liquid will be less than the standard one.