摘要
通过电感耦合等离子体原子发射光谱法(ICP-OES)和x射线荧光光谱法(XRF)分别测定硅酸盐样品中主量元素(SiO_(2)、Al_(2)O_(3)、TFe_(2)O_(3)、MgO、CaO、K_(2)O、Na_(2)O、MnO、P_(2)O_(5)、TiO_(2)),对样品制备、基体效应的校正、方法的检出限、精密度和准确度等实验进行了比较。ICP-OES采用无水偏硼酸锂高温熔融分解样品,王水溶液振荡溶解提取,各元素选用干扰较少的分析线进行测定。XRF采用超基性岩、黏土和部分国家一级的水系沉积物、土壤、岩石标准物质熔融制样,绘制校准曲线,使用基本参数法(FP)校正基体效应。结果表明,ICP-OES法比XRF测定线性范围宽(SiO_(2)除外),检出限低,但XRF分析效率高,操作便捷,成本低,绿色环保,结果理想,是目前大批量硅酸盐样品快速测定的可靠方法。
A comparison between Inductively coupled plasma optical emission spectrometry(ICP-OES)and X-ray flu-orescence spectrometry(XRF)for the determination of major elements(SiO_(2),Al_(2)O_(3),TFe_(2)O_(3),MgO,CaO,K_(2)O,Na_(2)O,MnO,P_(2)O_(5),TiO_(2))in silicate samples was made from the preparation of analytical sample,the correction of matrix effect,the detection limit,precision and accuracy of the method aspects.In ICP-OES,the sample was molten and decompo-sed with anhydrous lithium borate at high-temperature,and shock dissolved extraction in aqua regia solution,each element was determined using analytical lines with low interference.In XRF,the calibration curve was plotted using adopts ultrabasic rock,clay and some national level water system sediments,soil and rock standard materials by fusion method and synthesized limestone for spectral analysis.the fundamental parameter method(FP)was used as internal standard to correct the matrix effect.The results showed that the ICP-OES has a wider measurement range and lower detection limit than XRF except SiO_(2),but the XRF has high analytical efficiency,convenient operation,low cost,environmental protection and ideal result.It is a reliable method for rapid determination of major elements in large amounts of silicate samples at present.
作者
卜道露
张志翔
熊韬
龚仓
张坤
BU Dao-lu;ZHANG Zhi-xiang;XIONG Tao;GONG Cang;ZHANG Kun(Applied Geology Research Center of China Geological Survey,Chengdu 611732,China)
出处
《应用化工》
CAS
CSCD
北大核心
2021年第S01期378-382,385,共6页
Applied Chemical Industry
基金
2019年甘肃阳山金矿岩金普查项目(DD20191028)。
关键词
X射线荧光光谱法
电感耦合等离子体发射光谱法
碱熔
硅酸盐
主量元素
X-ray fluorescence spectrometry
inductively coupled plasma optical emission spectrometer
alkali fusion
silicate
major element
