DETERMINATION OF ORGANIC-CARBON IN AQUEOUS EXTRACTS OF SOILS AND FERTILIZERS
DETERMINATION OF ORGANIC-CARBON IN AQUEOUS EXTRACTS OF SOILS AND FERTILIZERS
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DOI：
10.1080/00103629109368455
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发表时间：
1991-01-01
影响因子：
1.8
通讯作者：
SEQUI, P
中科院分区：
文献类型：
--
作者：
CIAVATTA, C;GOVI, M;SEQUI, P
描述了一种简单而准确的常规测定土壤和肥料水提取物中有机碳的方法。在 160 +/- 2 摄氏度下，用 5 mL 2N 重铬酸钾加 20 mL 浓硫酸的混合物将样品氧化整整 10 分钟，然后用硫酸亚铁 (II) 电位滴定或手动滴定过量的重铬酸盐。建议对腐植酸水提取物采用适当的校正因子 (1.05)。
A simple and accurate method for the routine determination of organic carbon in aqueous extracts of soils and fertilizers is described. Samples are oxidized for exactly 10 minutes with a mixture of 5 mL of 2N potassium dichromate plus 20 mL of concentrated sulphuric acid at 160 +/- 2-degrees-C, and the excess dichromate is titrated either potentiometrically or manually with iron (II) sulphate. An appropriate correction factor (1.05) is suggested for aqueous extracts from humic acid.