Commonly Used Itens in laboratory

There are two basic types of glass which are most commonly used, and other specific features for specific uses are. The borosilicate glass is hard, heavy metal free and very resistant to thermal shock, corrosion and alkaline. It is primarily used when they go to make sudden changes file in temperature. It have a melting point between 750 and 1100 °C. The soda-lime glass have a lower melting point and give off minerals, It must be so handle with caution in clinical chemistry. There are other free glass as boron or high silica content to other particular properties. FlasksrnThe volumetric flasks are designed to hold a specific volume, marked with a line, so it should not be heated because they lose their calibration, i.e. they are able to measure the exact volume. Therefore, we use volumetric heating material. For which the contour can be round. rnGraduated cylindersrnGraduated cylinders are used to measure liquid with intermediate precision and mark with a series of lines as a rule. They are used when accuracy is important. It should not be over heated because the heat breaks the glass. BuretternBurette are dispensers to measure volume to maximum capacity and stock. you need to scrupulously clean burette before use. These graduates elongated containers in which one end is inserted to the measured and the other liquid end is tapered with a key opens and closes the that passage of liquid. PipettesrnThe pipettes are Used to transfer small volumes from one exact place to Another. They Usually Have a capacity of 0.1ml to 50ml. To Understand, are like fine glass tubes ending in a tip by one of the sides. The fluid is Absorbed Into the inside of the pipette by mechanical means. Other types of pipettes are micropipette, or automatic pipettes, Which Incorporate the liquid collection system and They Do Exactly as far graduation 0.01 ml to 10 ml Regularly. They are not mechanical devices are glass But That Were built a small disposable plastic tip Which houses the liquid collected. BeakersrnWhile graduates Can Go, not Normally Used as instrumental volume, low accuracy due to STI. It is normal style glasses, With an upper edge as a pitcher for easy pouring of the liquid. Up to 500-1000 ml capacity. WaterrnWater is the most widely used in the chemical laboratory of clinical chemistry. In any case, it does not use tap water as in any other laboratory. We must take Into account the unique properties of water and have large variations in constituents constitution it comes from. No source of natural water is pure enough for use in the laboratory without any purification process. Even rain water carries dissolved elements. The surface water contains organic compounds, salts and bacteria. Hard water contains calcium, iron. Pure water is suitable for all laboratory tests, subject to various purification procedures that are followed, Which vary in terms of our water needs, According to what will we need. A water may be submitted to several water distillation process to remove primary processes inorganic materials (bi-or tri water-distilled). The process Improve the system if you add a chemical to remove organic matter. In some cases it may be necessary to filter the water-through pores so small that it becomes sterile (free of microorganisms and stock).