Abstract
An apparatus for micro-determination of mercury by cold vapor atomic absorption by utilizing double-beam spectrophotometer was constructed. D2 lamp was displaced with mercury lamp and a gas flow cell (10 cm length, 2.5 cm i.d.) was placed in the cell room. Inorganic or organic mercury in the prepared solution was reduced by added stannous chloride and vaporized mercury was trapped once with a bundle of gold wires. Next time, the bundle in a quartz tube was heated and released mercury vapor was flowed through the absorption cell at a speed of 1.0 l/min. Atomic absorption by the vapor was recorded and mercury content was calculated. Calibration curves of inorganic and organic mercury, directly or after heating treatment, were agreed very well. Methylmercury chloride was separated well (82%) by direct distillation method, then total mercury, organic and inorganic mercury could be determined with these methods by using very small amount of samples.
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