Chapter 2 - Classifying Chemicals 1. Reagent Grade: Reagent...

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Chapter 2 Chemical Apparatus, and Unit Operation of Analytical Chemistry Classifying Chemicals 1. Reagent Grade: Reagent grade chemical conform to the minimum standards set forth by the Reagent Chemical committee of the American Chemical Society and are used wherever possible in analytical work. 2. Primary Standard Grade: Extraordinary purity is required for a primary standard. Primary standard reagent is carefully analyzed and the assay is printed on the container label. 3. Special-Purpose Reagent: chemicals that have been prepared for a specific application. Included among these are solvents for spectrophotometry and high-performance liquid chromatography.
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Rules for Handling Reagents and Solutions 1. Select the best grade of chemical available for analytical work. 2. Replace the top of every container immediately after removal of the reagent. 3. Hold the stoppers of reagent bottles between your fingers. 4. Never return any excess reagent to a bottle. 5. Never insert spatulas, spoons, or knives into a bottle that contains a solid chemicals. 6. Keep the reagent shelf and the laboratory balance clean and neat. 7. Observe regulations concerning the disposal of surplus reagents and solutions.
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Cleaning and Marking Laboratory Ware Every beaker, flask, or crucible that will contain the sample must be thoroughly cleaned before being used. The apparatus should be washed with a hot detergent solution and then rinsed, initially with tap water and finally with several small portions of deionized water. Organic solvents
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Chapter 2 - Classifying Chemicals 1. Reagent Grade: Reagent...

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