三、仪器的使用 1.仪器室和实验室要建立切实可行的规章制度。制定出仪器使用规则、试剂使用规则、实验室守则等。 2.玻璃器皿的洗涤方法。当硫酸铜、重铬酸钾、氯化铵和食盐溶液蒸发时,会有晶体沉淀物附在玻璃壁上,这可用水洗净。对于不溶于水的沉淀物,则要用少量的盐酸或氢氧化钾溶液才能洗净。 Third, the use of equipment 1. Instrument rooms and laboratories to establish practical rules and regulations. Formulate instrument usage rules, reagent usage rules, laboratory codes, etc. 2. Glassware washing methods. When the copper sulphate, potassium dichromate, ammonium chloride and salt solution evaporate, there will be a crystal deposit attached to the glass wall, which can be washed with water. For water-insoluble precipitates, use a small amount of hydrochloric acid or potassium hydroxide solution to wash.