光谱学与光谱分析, 2010, 30 (2): 546, 网络出版: 2010-07-23  

微波密闭消解ICP-AES法测定土-草-畜系统中无机元素

Determination of Inorganic Elements in the Soil-Grass-Animal System by Sealed Microwave Digestion ICP-AES
作者单位
1 兰州大学草地农业科技学院, 甘肃 兰州 730020
2 兰州大学青藏高原生态系统管理国际中心, 甘肃 兰州 730000
3 兰州大学分析测试中心, 甘肃 兰州 730000
4 甘肃省出入境检验检疫局, 甘肃 兰州 730020
5 兰州大学生命科学院, 甘肃 兰州 730000
摘要
采用微波密闭消解电感耦合等离子发射光谱法(ICP-AES)对青藏高原土壤-牧草-家畜矿物质系统中无机元素K, Ca, Na, Mg, P, S, Fe, Cu, Mn, Mo, Co和Zn的含量进行了测定, 对土壤样品消解采用HNO3-HF-H2O2酸溶体系, 而草畜样品消解则采用HNO3-H2O2酸溶体系, 以简化实验操作, 降低空白值。 方法的相对标准偏差均在5%以下, 回收率93.5%~113.5%。 实验表明该方法具有良好的准确度和精密度, 验证了分析数据的可靠性, 为研究青藏高原土-草-畜矿物质系统中矿物质元素含量、 循环、 互作以及在放牧补饲生产中科学运用矿物质元素与添加剂提供了科学依据。
Abstract
The contents of inorganic elements including K, Ca, Na, Mg, P, S, Fe, Cu, Mn, Zn, Mo, and Co in the soil-grass-animal mineral system from Qinghai Tibetan Plateau were determined by ICP-AES using high pressure system-sealed microwave digestion. The sample of soil was digested with HNO3-HF-H2O2 acids system, but others including pasture, animal fur, liver, and serum were digested with HNO3-H2O2 acids system. The operation would be simplified and the blank value would be decreased with the above acids systems. The results were proved to be reliable with the relative standard deviation being 0.271%-2.633% for Ca, 2.971%-4.854% for Co, 0.372%-2.874% for Cu, 0.600%-3.683% for Fe, 0.347%-2.829% for K, 0.626%-2.593% for Mg, 0.705%-4.828% for Mn, 2.946%-4.622% for Mo, 0.689%-3.621% for Na, 0.422%-3.890% for P, and 0.143%-4.622% for S, 0.166%-2.399% for Zn, and all of them were less than 5% for all the elements, and the recovery being 97.1%-101.4% for Ca, 93.5%-112.5% for Co, 95.2%-104.0% for Cu, 96.9%-104.2% for Fe, 96.1%-105.6% for K, 96.2%-102.8% for Mg, 91.5%-108.9% for Mn, 95.0%-113.5% for Mo, 95.2%-101.8% for Na, 94.7%-100.7% for P, 98.3%-108.4% for S, and 97.5%-102.0% for Zn by adding standard recovery experiment. The results of determination were proved that the method of sealed microwave digestion ICP-AES was sensitive, precise, easy to operate and rapid for the determination of inorganic elements in the soil-grass-animal mineral system, and could satisfy the sample examination request. The methods and results were meaningful to research on the soil-pasture-animal mineral system including the contents of mineral elements, the circulation of mineral elements, the interaction, and the application of mineral additive.

辛国省, 胡征, 周围, 杨志强, 郭旭升, 龙瑞军. 微波密闭消解ICP-AES法测定土-草-畜系统中无机元素[J]. 光谱学与光谱分析, 2010, 30(2): 546. XIN Guo-sheng, HU Zheng, ZHOU Wei, YANG Zhi-qiang, GUO Xu-sheng, LONG Rui-jun. Determination of Inorganic Elements in the Soil-Grass-Animal System by Sealed Microwave Digestion ICP-AES[J]. Spectroscopy and Spectral Analysis, 2010, 30(2): 546.

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