测空气中SO_2时的主要影响因素

Affecting Factors in Measurement of SO_2 in Atmosphere

目前测定空气中SO2主要采用甲醛吸收-副玫瑰苯胺分光光度法。该法操作比较严格,测试结果的准确度受诸多因素的影响。因此文中对这些影响因素进行了探讨,主要为试剂质量、显色温度和显色时间、溶液加入顺序、比色皿、空气采样器流量、采样温度、导气管的吸附等因素对测定结果的影响进行了探讨。

Sulfur dioxide in atmosphere is determined usually hy means of formaldehyide absorption rosaniline speetrophotometric method, however the method observes rigid regulations and curacy of the measured values were affected by many complications, whereupon the effect of some factors on curacy of determination were analyzed from aspects of agent quality, coloration temperature and duration, appending order of agents, colorimetric utensil, enactment of sampling runoff, sampling temperature, absorption of during airway and so on.