GB/T 11901-1989 PDF English
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GB/T 11901-1989: [GB 11901-1989] Water quality. Determination of suspended substance. Gravimetric method
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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA GB/T 11901-1989 Water Quality – Determination of Suspended Substance – Gravimetric Method APPROVED ON. DECEMBER 25, 1989 Implemented on. JULY 01, 1990 Approved by. State Bureau of Environmental Protection
Table of Contents
1 Theme Content and Applicable Scope... 3 2 Definition... 3 3 Reagents... 3 4 Instruments... 3 5 Sampling and Sample Storage... 3 6 Procedures... 4 7 Result Expression... 5 Additional Instructions... 6 Water Quality – Determination of Suspended Substance – Gravimetric Method1 Theme Content and Applicable Scope
This Standard specifies the determination of suspended substance in water. This Standard is applicable to the determination of suspended substance in surface water, groundwater, but also the domestic sewage and industrial wastewater.2 Definition
The suspended substance in water indicates the solid substance that water sample passes through the filter membrane with pore size of 0.45µm, trapped on the filter membrane, dried to constant weight at 103~105°C.3 Reagents
Distilled water or water with equal purity.4 Instruments
4.1 Commonly-used laboratory equipment and the following instruments. 4.2 All-glass microporous membrane filter.5 Sampling and Sample Storage
5.1 Sampling Use detergent to clean polyethylene bottle or hard glass bottle. Then successively rinse with tap water and distilled water. Before sampling, then clean for 3 times by the to-be-sampled water sample. After that, take the representative water sample of 500~1000mL; cap with stopper. 5.2 Sample storage The collected water sample shall be analyzed and tested as soon as possible. If placed, it shall be stored in the 4°C refrigerating box; but not exceeding a maximum of 7 days.6 Procedures
6.1 Preparation of filter membrane Clip the microporous filter membrane by flat-nose toothless tweezers; place into the weighing bottle with constant weight; move into bake oven to dry for half an hour at 103~105°C; 6.2 Determination Take 100mL of specimen that is mixed fully and uniformly. Make all the water pass through the filter membrane. Then use 10mL of the distilled water each time to wash for 3 continuous times; continue to suck and filter to remove the trace moisture. After stopping the suction and filtration, carefully take out the filter membrane loaded with suspended substance; place into the weighing bottle with constant weight; move into the bake oven to dry for 1 hour at 103~105°C; cool off to the room temperature, weigh it. Repeatedly dry, cool off, weigh it till the weight difference between two weight measurements is ≤0.4mg.7 Result Expression
The content of suspended substance C (mg/L) as per the following formula. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
