关键词: 分离富集技术, 液相微萃取, 固相微萃取, 紫外-可见分光光度法, 应用

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