This standard specifies atomic fluorescence spectrometry for determining mercury, arsenic, selenium, bismuth and antimony in water.
It is applicable to the determination of total quantity of soluble mercury, arsenic, selenium, bismuth and antimony in surface water, groundwater, domestic sewage and industrial wastewater.
For mercury, the detection limit by the method in this standard is 0.04μg/L, and the lower limit of determination is 0.16μg/L; for arsenic: 0.3μg/L and 1.2μg/L; for selenium: 0.4μg/L and 1.6μg/L; for bismuth and antimony, 0.2μg/L and 0.8μg/L.
2 Normative references
The following documents or provisions therein are quoted in this standard. For undated references, the valid edition of the normative document applies.
GB/T 21191 Atomic fluorescence spectrometry
HJ/T 91 Technical specifications requirements for monitoring of surface water and waste water
HJ/T 164 Technical specifications for environmental monitoring of groundwater
HJ 493 Water quality - Technical regulation of the preservation and handling of samples
HJ 494 Water quality - Guidance on sampling techniques
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1 soluble mercury, arsenic, selenium, bismuth and antimony
the contents of mercury, arsenic, selenium, bismuth and antimony determined after the non-acidified sample is filtered through a 0.45μm-pore size filter membrane
3.2 total quantity of mercury, arsenic, selenium, bismuth and antimony
the contents of mercury, arsenic, selenium, bismuth and antimony measured after degradation of unfiltered samples
3.3 determined elements
elements of mercury, arsenic, selenium, bismuth and antimony
