Standard addition

（重定向自Standard addition method）

Example standard addition plot. This graph is an example of a standard addition plot used to determine the concentration of calcium in an unknown sample by atomic absorption spectroscopy. The point at zero concentration added Ca is the reading of the unknown, the other points are the readings after adding increasing amounts ('spikes') of standard solution. The absolute value of the x-intercept is the concentration of Ca in the unknown, in this case 1.69E-6 g/mL.

The method of standard addition is a type of quantitative analysis approach often used in analytical chemistry whereby the standard is added directly to the aliquots of analyzed sample. This method is used in situations where sample matrix also contributes to the analytical signal, a situation known as the matrix effect, thus making it impossible to compare the analytical signal between sample and standard using the traditional calibration curve approach.

单词	Standard addition method
释义	Standard addition method 英语例句库 When both analytical and interferent components are in the sample, the isoabsorptivepoint standard addition method is proposed to obtain accu rate analytical result. 在分析物和干扰物共存时，为了获得准确的分析结果，提出了等吸收点标准加入法。英语百科 Standard addition （重定向自Standard addition method） The method of standard addition is a type of quantitative analysis approach often used in analytical chemistry whereby the standard is added directly to the aliquots of analyzed sample. This method is used in situations where sample matrix also contributes to the analytical signal, a situation known as the matrix effect, thus making it impossible to compare the analytical signal between sample and standard using the traditional calibration curve approach.
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