RG—1型单波长冷原子吸收热释测汞仪

介绍了采用“化学选择表面吸附”方法在气路中使用和ＮａＯＨ及Ｎａ２Ｏ２排除固样品热解产生的干扰气体的ＲＧ－１型单波长冷原子收测汞仪，仪器抗干扰能力≥３Ａ，允许直接热解纯硫２０ｍｇ及可能热解释放大量干扰气体的单矿物５０ｍｇ。主要技术眼过了双波长的塞曼原理测汞仪。

RG-1 Monowavelength Cold-Vapor Atomic Absorption Thermal Release Mercury Analyzer

A monowavelength coldvapor atomic absorption thermal release mercury analyzer is developed. NaOH and Na-2O-2 are used in the gas route to remove the interfering gases produced from the solid samples during thermal release step. The main technical features of this instrument are superior to the double wavelength mercury analyzer based on Zeeman principle. Combined with new computer system, the analytical functions of this instrument are extended with more convenience and flexibility. The stability of baseline is improved remarkably. Peak value, integral concentration and the statistic data for various technical specifications can be given directly. It also provides the function of phase spectrum analysis through highspeed thermal release. The detection limit of the instrument for Hg is 0.004 ng and as low as 6 ng/g of Hg in samples can be determined by this method. The precision of determination is <5% RSD(n=11) and the linear range is 3300 ng/g for Hg. The method has been applied to the determination of mercury in the national standard reference materials. The results are in agreement with the certified values.==