1. Choose a laboratory spoon of an appropriate size based on the quantity of the reagent being used.

  2. Do not use the spoon to handle hot substances, and avoid contact with acidic or alkaline solutions.

  3. After using the spoon, promptly wipe it clean with paper.

  4. It is advisable to dedicate specific spoons to specific uses. Small glass spoons made from glass rods can be stored long-term in small wide-mouthed bottles containing solid reagents, eliminating the need for washing after each use.

When handling powdered substances, such as when using the spoon (or paper trough), follow these steps: "tilt, deliver, and stand upright." Specifically, tilt the test tube first, carefully delivering the spoon (or paper trough) containing the substance to the bottom of the test tube, and then stand the test tube upright.

By 向阳 翟


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