GB/T 11901-1989 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 11901-1989 | English | 70 |
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[GB 11901-1989] Water quality. Determination of suspended substance. Gravimetric method
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GB/T 11901-1989: [GB 11901-1989] Water quality. Determination of suspended substance. Gravimetric method
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT11901-1989
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 Method
1 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.
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