岩矿测试2024，Vol.43Issue(6)：928-935,8.DOI:10.15898/j.ykcs.202409020177
超声消解-电感耦合等离子体发射光谱法测定土壤和沉积物中的硅
Determination of Silicon in Soil and Sediment by ICP-OES with Rapid Ultrasonic Digestion
摘要
Abstract
The literature provides references for the accurate determination of silicon content in soil and sediment by inductively coupled plasma-optical emission spectrometry(ICP-OES).Sample decomposition methods often use acid dissolution or melting methods.Silicon reacts with hydrofluoric acid in concentrated acid solution to form volatile silicon tetrafluoride,which is lost due to heating.The melting method can process soil and sediment samples,but it introduces a large amount of salt,a significant matrix effect and high detection limit.This article describes a method for determining silicon content in soil and sediment using ultrasonic sealed acid dissolution and ICP-OES.After the sample was dissolved in dilute aqua regia,hydrofluoric acid,and hydrogen peroxide in an ultrasonic apparatus and diluted to a constant volume,the sample was measured using ICP-OES equipped with a hydrofluoric acid resistant injection system.During ICP-OES testing,251.61 1nm was selected as the analytical spectral line for silicon.The correlation coefficient of the standard curve in the range of 5mg/L to 50mg/L was greater than 0.99997,and the detection limit of the method was 0.0395mg/g.This method was used to test different types of soil and sediment standard substances,with relative standard deviations(RSD)ranging from 0.26％to 0.54％and relative errors ranging from-0.28％-0.25％.The actual sample testing RSD range from 0.52％to 0.77％.Verified by national standard substances GBW07401a,GBW07405a,GBW07377,and GBW07379,the measured values of silicon element were consistent with the standard values.At the same time,X-ray fluorescence spectrometry was used to determine the silicon content in these four national standard substances,and the results were consistent.关键词
硅/土壤/沉积物/超声封闭消解/电感耦合等离子体发射光谱法Key words
silicon/soil/sediment/ultrasonic sealed digestion/inductively coupled plasma-optical emission spectrometry分类
化学化工引用本文复制引用
孔胜男,许实..超声消解-电感耦合等离子体发射光谱法测定土壤和沉积物中的硅[J].岩矿测试,2024,43(6):928-935,8.基金项目
国家自然科学基金面上项目"亚热带富磷和贫磷立地森林土壤碳固持机制"(32271846) （32271846）
