The matrix plays a very crucial role in trace determinations, as it affects various analytical parameters if it is not properly evaluated. In the following study, the role of matrices, on the analytical parameters, were evaluated using MERCK ICP-multi elemental standard IV solutions diluted to varying concentrations from 0.1 μg mL⁻¹ to 1000 μg mL⁻¹ in dilute acid medium. The recovery rates and the relative standard deviations were evaluated to express the accuracy and the precision of the measured elemental concentrations. The recovery rate is the ratio of the experimentally and theoretically obtained analytical values of a concentration. The average relative standard deviations of the relative sensitivity values were within 7% for analyte concentrations within 20 μg mL⁻¹ and within 12% for higher concentrations. The recovery rates were mostly negative (<100%) for the elements with concentrations above 50 μg mL⁻¹, suggesting the evidence of matrix effect in these samples. In order to study the effects of different matrix elements (atomic number Z) on the evaluation of the analytical parameters, solutions of Al (Z = 13), Zr (Z = 40) and U (Z = 92) containing trace elements were also studied. In the case of Al, no significant matrix effect was observed irrespective of its concentration. However, in Zr and U, the matrix effect was negligible at 100 μg mL⁻¹ concentration of the matrix, and evidence of significant matrix effects was observed in the samples with matrix concentrations of 1000 μg mL⁻¹. The detection limits varied systematically with the analyte concentration, matrix concentration and matrix elements.

中文翻译：

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基质在使用TXRF光谱法评估痕量测定分析参数的评估中的作用

基质在痕量测定中起着至关重要的作用，因为如果评估不当，它将影响各种分析参数。在以下研究中，使用在稀酸培养基中稀释至0.1μgmL ^-1至1000μgmL ^-1的不同浓度的MERCK ICP-多元素标准IV溶液评估了基质在分析参数上的作用。评价回收率和相对标准偏差，以表示所测元素浓度的准确性和精密度。回收率是通过实验和理论获得的浓度分析值之比。对于20μgmL ^-1之内的分析物浓度，相对灵敏度值的平均相对标准偏差在7％之内浓度在12％以内。对于浓度高于50μgmL ^-1的元素，回收率大多为负值（<100％），这表明这些样品中存在基质效应。为了研究不同基质元素（原子序数Z）对分析参数评估的影响，还添加了含有痕量元素的Al（Z = 13），Zr（Z = 40）和U（Z = 92）的溶液。研究。对于Al，无论其浓度如何，均未观察到明显的基质效应。但是，在Zr和U中，在100μgmL ^-1时基质效应可忽略不计在基质浓度为1000μgmL ^-1的样品中观察到明显的基质效应，并观察到明显的基质效应。检测限随分析物浓度，基质浓度和基质元素而系统变化。