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Low absorbance differential spectrophotometry

Zhao Shanlin, Ping Li, Liu Guomin, Lixiang Wu, Zhang Qikai

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Abstract

A low absorbance differential spectrophotometry method is proposed. This method is investigated theoretically and experimentally. Its precision and accuracy are compared with those of ordinary spectrophotometry. The results of the proposed method are better than those of normal spectrophotometry in the analysis of the low absorbance samples. In addition, the common problem of the nonlinear relationship between differential absorbance and concentration has been resolved in this method.

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What this paper is about

A low absorbance differential spectrophotometry method is proposed. This method is investigated theoretically and experimentally. Its precision and accuracy are compared with those of ordinary spectrophotometry. The results of the proposed method are better than those of normal spectrophotometry in the analysis of the low absorbance samples. In addition, the common problem of the nonlinear relationship between differential absorbance and concentration has been resolved in this method.

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Available abstract

A low absorbance differential spectrophotometry method is proposed. This method is investigated theoretically and experimentally. Its precision and accuracy are compared with those of ordinary spectrophotometry. The results of the proposed method are better than those of normal spectrophotometry in the analysis of the low absorbance samples. In addition, the common problem of the nonlinear relationship between differential absorbance and concentration has been resolved in this method.

Key concepts: Absorbance, Spectrophotometry, Chemistry, Chromatography, Infrared Spectrophotometry, Analytical Chemistry (journal)

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