樹(shù)脂固相萃取在比色分析中的應(yīng)用研究
中國(guó)測(cè)試雜志
林 虹， 蔡蘋楊， 謝光明， 胡 萍
（四川省地質(zhì)工程勘察院環(huán)境工程中心，四川 成都 610072）
摘 要：針對(duì)可見(jiàn)光區(qū)藍(lán)（磷鉬藍(lán)測(cè)硫體系）、黃（磺基水楊酸測(cè)鐵體系）、紅（a-萘胺測(cè)NO2-體系）3個(gè)典型波段，研究樹(shù)脂固相萃取有色基團(tuán)前后的吸光度變化，表明各波段固相比色分別較水相比色最大增長(zhǎng)了53.67倍、20.04倍、10.50倍。實(shí)驗(yàn)確定了最佳樹(shù)脂用量為3 g，最佳萃取時(shí)間30 min。模擬土壤、地質(zhì)巖石及水質(zhì)樣品的復(fù)雜組合，表明樹(shù)脂富集有色基團(tuán)干擾不嚴(yán)重，方法可應(yīng)用于各類樣品中微量元素的比色分析。
關(guān)鍵詞：樹(shù)脂；固相萃取；比色分析；應(yīng)用
中圖分類號(hào)：TQ322.4；O652.63；O657.32；O658.1 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1674-5124（2013）03-0042-03
Research on application of resin solid phase extraction in colorimetric analysis
LIN Hong， CAI Ping-yang， XIE Guang-ming， HU Ping
（Center of Environmental Engineering，Sichuan Institute of Geological Engineering Investigation，
Chengdu 610072，China）
Abstract: Molybdenum blue measuring sulphur system， sulfosalicylic acid measuring iron system and α-naphthylamine colorimetric measuring nitrite ion system were studied in this paper. The absorbance after resin solid-phase extraction was compared with that before extraction， and the molar extinction coefficient， that is a multiple of the sensitivity， increased respectively 53.67， 20.04， and 10.50 times over the aqueous phase. The optimum amount of resin is 3 g， while the optimum extraction time is 30 min. The mixture system of water samples and soil samples or geological rock samples was simulated， which show that the interference of resin concentration was not great. This method can be applied to various types of colorimetric analysis of micro.
Key words: resin； solid phase extraction； colorimetric analysis； application
