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本文作者认为稀碱溶液中S~=不稳定,其损失系由Cu~(++)催化S~=的氧化反应所致。为了稳定碱液中的S~=,作者提出用0.1M NaOH+1%TEA+0.1%EDTA为H_2S的吸收液,在这种吸收液中Cu~(++)及其它金属离子形成了络合物使S~=得以稳定。用作者提出的吸收液测定H_2S,采集效率大于95%,室温下放置10天H_2S损失少于5%,空气中H_2S浓度在1.4～21.0/m~3范围内时,回收率在96～112%之间。常用的以碱性氢氧化镉为吸收液,亚甲蓝-分光光度法回收率尚不到80%,可见本法在前人研究的基础
The authors consider that S ~ = unstable in dilute alkali solution and its loss is caused by the oxidation of S ~ = catalyzed by Cu ~ (++). In order to stabilize S ~ = in lye, the authors propose an absorption solution of H 2 S with 0.1M NaOH + 1% TEA + 0.1% EDTA in which Cu ~ (++) and other metal ions form a complex S ~ = so that things can be stabilized. The recovery rate of H_2S was 96% ~ 112% when H_2S concentration in the air ranged from 1.4 ~ 21.0 / m ~ 3 when the concentration of H_2S was less than 5% between. Commonly used to alkaline cadmium hydroxide as absorbent, methylene blue - spectrophotometric recovery was less than 80%, showing the basis of the previous study of this law