Blank Solutions in Analytical Testing

Blank solutions are used in analytical testing to show the background signal before a sample is measured. A blank solution does not contain the analyte, which is the substance of interest being tested or measured. It is usually made with the same reagents and procedure as the sample solution, but without the analyte.

除分析物外，包含分析所需所有组分的溶液称为空白溶液。

在相同条件下，使用与标准溶液和待测样品相同的仪器测量空白溶液。该空白测定可揭示系统误差以及由试剂和溶剂中杂质引起的误差。

通过从后续所有测量值（如标准溶液或待测样品的测量值）中减去空白样的数值，以消除误差。空白样和标准溶液的测量值用于绘制校准曲线，而待测样品测得的数值则用于准确确定分析物的未知浓度。

在滴定分析中，空白溶液用于消除滴定剂中杂质引起的误差。