Application of Separation and Pre-concentration Techniques in the Determination of Metal Elements by#br# UV-vis Spectrophotometry

Abstract

Abstract: With the development of science and technology, analyses of geological, biological, environmental samples often requires
the determination of mg/L, μg/L or ng/L levels of trace and ultra-trace elements. Due to instrument sensitivity and sample matrix
interference, many analytical instruments often encounter difficulties in determining trace or ultra-trace components in these complex
matrix samples, and it is even impossible to achieve accurate measurements. So, separation and pre-concentration techniques are very
important for analytical chemistry and are often used to improve the sensitivity and selectivity of instruments and analytical methods.
The purpose of this paper is to review the new applications of separation and pre - concentration techniques in UV- vis
spectrophotometric determination of metal elements, including the applications of liquid phase micro-extraction and solid phase microextraction.

Key words: separation and pre -concentration techniques, liquid phase micro-extraction, solid phase micro-extraction, UV-vis
spectrophotometry, application

Wen Xiaodong, Yang Shengchun, Deng Qingwen, Hu Kan. Application of Separation and Pre-concentration Techniques in the Determination of Metal Elements by#br# UV-vis Spectrophotometry[J]. Journal of Dali University, 2019, 4(12): 36-43.

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