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4 Test method
4.
Some test procedures specified by the test method may lead to dangerous situations
4.
Unless otherwise specified, only reagents confirmed to be analytically pure and grade 3 water specified in GB/T6682-1992 are used in the analysis
4.
Take an appropriate amount of laboratory samples in a colorimetric test tube, and visually observe whether the samples have suspended solids and organic impurities
4.
Carry out according to the method specified in GB/T21541-2008
4.
Carry out according to the method specified in GB/T21541-2008
4.
Carry out according to the method specified in 4.
4.
Carry out according to the method specified in 4.
4.
Carry out according to the method specified in GB/T3143-1982
5 Inspection rules
5.
1 All items specified in the requirements of Chapter 3 of this standard are ex-factory inspection items, and ex-factory inspection should be carried out batch by batch
.
5.
2 Trichloromethane for industrial use shall be a batch of homogeneous products of the same quality
.
One batch of barreled products should be no more than 100t, or one batch of product in one storage tank or one tank
.
5.
3 The sampling of industrial chloroform shall be carried out in accordance with the provisions of 7.
1 of GB/T6680-2003
.
The number of sampling units for barreled products shall be carried out in accordance with the regulations in GB/T6678-2003, and the total amount of sampling shall meet the needs of inspection
.
5.
4 Trichloromethane for industrial use should be inspected by a quality inspection department with a wide range of production
.
Each batch of products should be accompanied by a quality certificate, which includes: product name, product grade, manufacturer name, factory address, batch number or production date and the standard number
.
5.
5 The test result is judged according to the rounding value comparison method in GB/T1250
.
If one of the inspection results does not meet the requirements of this standard, the barreled product shall be re-sampled from the packaging unit of the two-trusted quantity for inspection, and the tank-packed product and the tank-canned product shall be re-sampled for inspection
.
Even if only one index does not meet the requirements of the wood standard as a result of the re-inspection, the entire batch of products is unqualified
.
6 Marking, packaging, transportation and storage
6.
1 Industrial chloroform packaging containers should have a firm and clear mark, which includes: product name, trademark, manufacturer name, site, net content, batch number, product grade, number of this standard, and “drugs” stipulated in GB190 Logo, the "fear of rain" and "fear of rain" signs specified in GB/T191-2000
.
6.
2 Industrial chloroform should be used in dry and clean galvanized iron drums, with protective coating iron drums or tanks in airtight packaging
.
Packed in iron drums, the net weight per drum is (200±0.
5)kg, (250±0.
5)kg, or according to user requirements
.
6.
3 The volume of galvanized iron drums, protective coating iron drums or tanks should be adjusted according to the total volume of the iron drums or tanks and the volume expansion caused by changes in the temperature and other factors allowed for the chloroform product during transportation.
.
6.
4 Trichloromethane products for industrial use should be stored in a cool, ventilated and dry place, not close to heat sources, and avoid exposure to the sun and rain
.
6.
5 Industrial chloroform products should not be hit during transportation and loading and unloading, and should be handled with care to avoid damage to the packaging container and product leakage
.
6.
6 The stabilizer of chloroform for industrial use is ethanol or pentene
.
6.
7 The shelf life of industrial chloroform after adding stabilizers is 6 months from the date of production
.
7 Security
Industrial chloroform can be decomposed by heat to produce highly toxic phosgene
.
In case of high heat, the pressure in the container will increase, which may cause cracking and explosion
.
Wear anti-expansion products when touching or using chloroform
.
In case of skin contact, thoroughly rinse the skin with soapy water and clean water for at least 15 minutes.
In case of eye contact, rinse with running water or normal saline and seek medical attention
.