Test tube holders are used to distance a person from potentially dangerous tasks when using chemicals in test tubes. They not only extend a person's reach, they protect the user from harm while performing basic lab tasks.
Reference.com defines a test tube holder as a clamp made from metal, opened by squeezing the handle, that is used to grab test tubes with the far end. The handle insulates the user from harm if an exothermic or endothermic reaction takes place in a test tube, which could potentially burn or freeze a person's hand. Test tube holders add to a person's reach, allowing them to heat the contents of a test tube in the flame of a Bunsen burner without risk of burning themselves on the flame or the heated glass. They also provide distance when pouring liquids from one test tube to another, protecting the user from volatile reactions which might spew out heat, sparks or harmful chemical fumes. If the test tube breaks during the course of use, proper use of a test tube clamp prevents injury from the resulting glass shards. Test tube holder use is considered standard practice in any lab situation using potentially volatile chemicals or chemical reactions.Learn More
Test tubes are used by chemists in the lab to heat, hold and mix small quantities of liquid or solid chemicals during experiments. They have a round bottom and are made of borosilicate glass to withstand temperature changes and resist the reaction of chemicals.Full Answer >
Laboratories are typically stocked with frequently used equipment, such as beakers, graduated cylinders, Erlenmeyer flasks, Bunsen burners, rulers, thermometers, slides, test tubes and racks, microscopes, magnifying glasses, petri dishes, balances, clamps and ring stands. Lab users also need a handy supply of pipettes, tongs, eye droppers, stirring rods, test tube holders, clay triangles and other handling tools to reduce direct contact with chemicals and hot surfaces.Full Answer >
Flame photometers work by separating a chemical sample into its constituent atoms and molecules and then analyzing the colors emitted by the chemicals as they absorb and then release energy. Flame photometers are most commonly used in inorganic chemistry as a way of detecting and identifying the compounds present in metal salts.Full Answer >
There are several components, including catalysts, heat and pressure, that when added to chemicals and chemical reactions incite or speed up the reaction process. One of the most helpful biological additives in chemical reactions are enzymes.Full Answer >