Process for determining traces of mercury in liquids

Details Process for determining traces of mercury in liquids Process for determining traces of mercury in liquids

1975-08-27

1977-05-17

Yudkoff, Norman

Chemistry: physical processes

Physical processes

Crystallization

23232R, 23253PC, 23254R, G01N 3112, G01N 3106, G01N 3318

Patent

active

040239292

ABSTRACT:
In a process for determining the total mercury content in samples of effluent water, the sample is collected on a sample collector where it is evaporated at 1000.degree. C before it is decomposed in a pyrolysis zone at 1000.degree. to 1200.degree. C. The mercury in the liquid sample is thereby expelled as vapor and together with carrier gas it is conducted over a metal sheet which absorbs the mercury and concentrates it. The concentrated mercury is then expelled by heating the metal and transferred by the carrier gas into a mercury absorption photometer where it is determined quantitatively.

REFERENCES:
patent: 3565583 (1971-02-01), McNulty et al.
patent: 3884639 (1975-05-01), Sugiyama
patent: 3933431 (1976-01-01), Trujillo et al.
patent: 3957441 (1976-05-01), Baba
Lidums et al., "Mercury Analysis in Biological Material by Direct Combustion in Oxygen and Photometric Determination of the Mercury Vapour," Acta Chem. Scand. 22(1968), No. 7, pp. 2150-2156.
Thomas et al., "Rapid Pyrolytic Method to Determine Total Mercury in Fish," Anal. Chem., vol. 44, No. 3, Mar. 1972, pp. 512-514.

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