有机元素分析中,多采用重量法和容量法。仪器分析的应用尚不多。测定有机化合物中的硫,通常是将硫轉变为硫酸根离子,以鋇盐直接滴定或以EDTA絡合剂間接滴定。但由于溶液中硫酸鋇沉淀的存在给目视法測定終点带来了一些困难。本法应用三角瓶燃烧法分解試样,以硝酸鉛电流滴定吸收液中所形成的硫酸根离子,并消除了碘的干扰影响。 Organic elemental analysis, the use of gravimetric method and capacity method. Instrument analysis is not much application. Determination of sulfur in organic compounds, usually sulfur is converted to sulfate ions, with barium salt titration or EDTA complexing agent indirect titration. However, the presence of barium sulphate in solution poses some difficulties for the visual determination of the endpoint. This method uses triangle flask combustion method to decompose the sample, the titration with lead nitrate titration of the sulfate ions in the absorption solution, and to eliminate the interference of iodine.