The 4 definition

No

5 safety precautions

The lotion is very corrosive, special attention should be paid to should be carried out in a hood preparation and use of the process, wear protective glasses and gloves.

6 rules

6.1. in the analysis work, cleaning glass instrument is a must do the preparation before the work, but also a technical work. Instrument washing compliance requirements, accuracy and precision have influence on the test work.

General steps of 6.2. washing apparatus

6.2.1. for the new glass instrument, first soak with water or with a brush with detergent cleaning, drying, and then lotion soak for a few hours, wash.

6.2.2. analyst do the experiment, the the solution drained residual glass within the instrument, and the water will wash, put in the marked "for cleaning glass instrument" floating car, note that if the main composition is a non water soluble substances or insoluble substances, completed with the glass instrument should be put in the floating car below, the car should be marked "with lower flow cleaning lotion".

6.2.3. analyst assistant will flow on the car "for cleaning glass instrument" clean at any time.

6.2.4. bottle washing machine cleaning first water after cleaning the glass instrument into the bottle washing machine, and then adjust the washing time and drying time needed, stay after cleaning out cold, after drying into the storage room.

6.2.5. glass when the instrument is cleaned, bottle washing machine to stop using, the purified water inlet is connected with the bottle washing machine apart, and monthly using 75% alcohol to disinfect the connection pipeline.

Instrument of inverted 6.2.6. abluent, water outflow inner wall of the container should not hanging drops.

The use of 6.3. washing liquid

Preparation method: grinding chromic acid dichromate 20g dissolved in 40ml water, stirring slowly adding concentrated sulphuric acid for 360ml.

According to the property of contaminants on the instrument, instrument can not effectively wash with detergent, the general use of chromic acid soak overnight.

6.4. glass instrument drying and storage

6.4.1. glass instrument after washing, inverted on the glass instrument rack to dry or placed in the oven drying. Note: the capacity of the apparatus can not be drying.

6.4.2. belt grinding port plug instruments such as volumetric flask, the best colorimetric tube in the cleansing before use cotton rope to plug and Guan Shuan good, so as not to break the plug or confuse each other.