CAJ | 학술논문

用盐酸预处理样品以驱除样品中的无机碳，滤出酸不溶物并洗净，待干燥后置于高频红外碳硫仪中，在富氧气流中充分燃烧，有机碳被氧化成CO2，在4.26微米处具有很强的红外特征吸收，符合朗伯比尔定律，通过测量光强度的变化就能换算成混合气体中二氧化碳的含量，进而得出样品中总有机碳的含量。对含有机碳为1.1%的国家一级标准物GBW07423（GSS-09）测试12次，标准偏差为3.45%，对含有机碳为0.45%的一级标准物质GBW07307a（GSD-07a）测试12次，标准偏差为3.10%，对空白测定12次，计算检出限（6δ）为0.004%。
용염산예처리양품이구제양품중적무궤탄，려출산불용물병세정，대간조후치우고빈홍외탄류의중，재부양기류중충분연소，유궤탄피양화성CO2，재4.26미미처구유흔강적홍외특정흡수，부합랑백비이정률，통과측량광강도적변화취능환산성혼합기체중이양화탄적함량，진이득출양품중총유궤탄적함량。대함유궤탄위1.1%적국가일급표준물GBW07423（GSS-09）측시12차，표준편차위3.45%，대함유궤탄위0.45%적일급표준물질GBW07307a（GSD-07a）측시12차，표준편차위3.10%，대공백측정12차，계산검출한（6δ）위0.004%。
A new method for determination of organic carbon in soil and sediment by high frequency infrared car-bon sulfur analyzer are described in this paper. Samples were pretreated by hydrochloric acid to remove the inor-ganic carbon, filter out the acid insolubles and clean it, after being dry, put it into the high frequency infrared car-bon sulfur analyzer for burning in the rich oxygen flow, organic carbon was oxidized to CO2, which has strong characteristics of infrared absorption at 4.26 microns and conforms to the lambert beer's law, we can get the con-tent of the carbon dioxide in the mixed gases by measuring the change of light intensity, then the total organic car-bon content in the sample are obtained. The standard deviation is 3.45%and 3.10%by testing the GBW07423 (GSS-09)and GBW07307a (GSD-07a)for 12 times respectively. The detection limit was 0.004% by testing blank for 12 times and calculating by six sigma.