A Manual of Selected Biochemical Methods

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Excerpt from A Manual of Selected Biochemical Methods: As Applied to Urine, Blood and Gastric AnalysisNeatness and order are the first requisites of proper laboratory work of any kind. Neat workers only can be accurate manipula tors. Orderly work leads to fewer mistakes than work which is done hurriedly and without system or plan.In order to obtain proper quantitative results absolute clean liness is essential. All of the apparatus used should be left in a chemically clean condition. Most of the apparatus can best be cleaned by rinsing well with warm water, then washing with soap and water and brush or cloth, then again rinsing well with warm water, and finally rinsing with distilled water. Never dry beakers or other chemical vessels with a towel. If it is necessary to dry a vessel quickly rinse with alcohol and ether and dry with a current of air or dry by gently warming after rinsing with. Distilled water. Use judgment in cleaning your apparatus. Always use the appropriate solvent first, then remove the excess of the solvent and continue the washing as above. Pipettes and burettes after the preliminary cleaning with the appropriate solvent and rinsing as above indicated, often require further treatment with cleaning mixture. Finally rinse well with warm water and distilled water. Do not use cleaning mixture unless it is necessary.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.