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Laboratory flask sizes are specified by the volume they can hold, typically in metric units such as milliliters (mL or ml) or liters (L or l). Laboratory flasks have traditionally been made of glass , but can also be made of plastic .
These flasks are usually pear-shaped, with a flat bottom, and made of glass or plastic. The flask's mouth is either furnished with a plastic snap/screw cap or fitted with a joint to accommodate a PTFE or glass stopper. The neck of volumetric flasks is elongated and narrow with an etched ring graduation marking. The marking indicates the volume ...
Most also have a small spout (or "beak") to aid pouring, as shown in the picture. Beakers are available in a wide range of sizes, from one milliliter up to several liters. A beaker is distinguished from a flask by having straight rather than sloping sides. [2] The exception to this definition is a slightly conical-sided beaker called a Philips ...
The units may be milliliters or fractions of a liter, or the cup (unit, with varying definitions) with its fractions (typically 1/4, 1/3, 1/2, 2/3, and 3/4), pints, and often fluid ounces. Dry measure cups are distinguished from liquid measure cups in that they are meant to be filled to the top so that excess may be scraped off and shallow for ...
400 salt: 1.8% 0.036 0.576 ... approximate cup volumes range from 236.59 to 284.1 milliliters ... Adaptation of volumetric recipes can be made with density ...
Other countries have smaller units – India uses 350 ml, [59] Singapore 350 or 450 ml, [60] and Japan 200 or 400 ml. [61] Historically, donors in the People's Republic of China would donate only 200 ml, though larger 300 and 400 ml donations have become more common, particularly in northern China and for heavier donors. [62]
Vial of vaccine and syringe Examples of modern flat-bottomed plastic vials Sterile single-use vial of eye drops. A vial (also known as a phial or flacon) is a small glass or plastic vessel or bottle, often used to store medication in the form of liquids, powders, or capsules.
In the "one point cut" (OPC) ampoules a dot above the neck identifies the correct thumb placement that aligns the thumb with a pre-made micro-score in the ampoule. If properly done, this last operation creates a clean break without any extra glass shards or slivers, but the liquid or solution may be filtered for greater assurance.