Microwave Digestion for Colorimetric Determination of Total Si in Plant and Mineral Samples
文献类型： 外文期刊
作者： Liu Saihua 2 ; Xie Yunhe 1 ; Ji, Xionghui 1 ; Juan, Huang 1 ; Bocharnikova, E. A. 3 ; Matichenkov, V. V. 4 ;
作者机构： 1.Hunan Acad Agr Sci, Inst Agroenvironm & Ecol, Changsha, Hunan, Peoples R China
2.Minist Agr, Key Lab Agroenvironm Midstream Yangtze Plain, Changsha, Hunan, Peoples R China
3.RAS, Dept Physicochem Soil, Inst Phys Chem & Biol Problems Soil Sci, Pushchino, Russia
4.RAS, Inst Basic Biol Problems, Dept Ecol & Physiol Autotroph Organisms, Pushchino, Russia
关键词： Alkali fusion; autoclave digestion; microwave digestion; plant sample digestion; silicon
期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）
ISSN： 0010-3624
年卷期： 2018 年 49 卷 7 期
页码：
收录情况： SCI
摘要： A new method for determining the soluble silicon (Si) concentrations in nonliquid plant and mineral samples was developed using sodium hydroxide (NaOH)-hydrogen peroxide (H2O2) matrix for microwave digestion (MWD-Na) followed by colorimetric Si testing. MWD-Na was compared with autoclave-induced digestion and alkali fusion. The data have shown no significant difference between these three methods. HNO3-H2O2 or HNO3-H2O2-HF microwave technique results in Si loss. The reduction of the total Si can be realized via low solubility of Si in the acid solutions or silicon tetrafluoride formation. The Mullen and Riley method for colorimetric testing of Si in a solution that uses ascorbic acid to reduce the silicomolybdate complex formed under acid conditions to an intensely blue complex was modified using iron sulfate. The combination of MWD-Na and modified colorimetric blue method provides cheap and valid data on determining the total Si in both plant and mineral samples.
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