Plastic beakers: basic chemistry experiments

Plastic beaker chemistry experiment basic operation

A, the plastic beaker drug access

(a) three principles

1. access to drugs "three" principle of not: do not touch, do not taste, do not smell

2. take the amount of drugs: "saving principle"

(1) strictly in accordance with the experimental dosage;

(2) the amount not specified to take the smallest amount: liquid 1mL-2mL; solid cover the bottom of the test tube.

3. experiments remaining drugs "three no" principle: not to lose or return not to take away