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GB/T 7468-1987 Water quality--Determination oftotal mercury--Cold atomic absorption spectrophometry

Standard Number:  GB/T 7468-1987
Title:  Water quality--Determination oftotal mercury--Cold atomic absorption spectrophometry
Language:  Simplified Chinese
Publication Date:  1987/3/6
Execute Date:  1987/8/1
Revocatory Date:  2011/6/1
Adopted International Standard:  ISO 5666-1~5666-3:1983
Standard Type:  Method
International Classification for Standards (ICS)ENVIRONMENT. HEALTH PROTECTION. SAFETY>>Water quality
Publisher:  Chinese Standards(GB)
Price:---  
Number of Pages:7P.;A4  

Description:This standard applies to surface water, groundwater, drinking water, sewage and industrial wastewater. Iodine ion concentration is greater than or equal to 3.8 mg/l will significantly affect the recovery rate of potassium permanganate, potassium persulfate digestion using nitric acid and precision. When the concentration of detergent is greater than or equal to 0.1 mg/l, using potassium bromate, potassium bromide digestion method, the recovery rate of mercury was less than 67.7%. If the organic matter content is higher, 6.1.1.2 or 6.2.1 steps of digestion reagents Large dosage to oxidation, organic matter in samples, this method does not apply. This standard minimum detection concentration of mercury 0.1 mu g/l; Under the best conditions (baseline noise and mercury meter high sensitivity, low reagent blank value), when trying a volume of 200 ml, check out the lowest concentration of 0.05 mu g/l.  
Cross References:HJ 597-2011
ISO 5666-1,;
  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  395KB
Tile in English:  Water quality--Determination oftotal mercury--Cold atomic absorption spectrophometry

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