SRIM-HG一Ⅲ型单片机控制汞/氢化物循环发生式装置

本文首次提出一种制造成本低、自动化程度高、测量精度好的汞／氢化物循环发生式装置。样品溶液2．5ml时分取精度≤万分之八；还原剂1．0ml时加液精度≤千分之三。具有消除水蒸汽和测定峰形拖尾以及渗微量空气于气路的功能。对测碲、硒、铅比一般批式发生器有更好的灵敏度、线性及精密度。可自动循环工作，分析速度快，120～180只样／每小时。氢化元素特征含量为0．3～0．8ng／1％吸收，精密度为0．7～1．5％（n=20～44）

A circulating-type mercury/hydride generator has been designed, lts manufacturing cost is low,and itoperates automatically with hlgh accuracy of measurement. The test solution can be aliquoted with a R S D≤0. 08% atthe level of 2. 5ml a1iquot. The aqueous so1ution of sodium tetrahydroborate can be added with a R S D≤0. 3 % at thelevel of 1ml addition. It has lhe functions of eIiminating the effect of steam and [ailing of absorption peaks and allowingair in microamounts to permeate into the carrier gas. This makes the determinations of Te,Se and Pb more sensitive,linear and accurate than those by the batch method. It can operate in circulation mode, l2o~ l8O samles can be analysed perhour. The characteristic contents of hydride-elements: 0. 3~ 0. 8ng/1 % with R S D of0. 7~15%,n = 20~ 44.