一种用于电热蒸发-原子光谱的微型化固相萃取技术

与传统的液 液萃取相比 ,固 液萃取技术具有省时、溶剂用量少、不易乳化和高富集因子等优点1],它可与各种检测方法联用2 ],已在痕量无机物或有机物的分离富集与测定中广泛应用 .但是常规的固相萃取中的洗脱过程存在洗脱体积大 ,时间长及要求二次处理等缺点 ,这与电热蒸发 (ＥＴＶ)进样 /电感耦合等离子体原子发射光谱 /质谱 (ＩＣＰ ＡＥＳ/ＭＳ)和电热原子吸收光谱 (ＥＴＡＡＳ)很不匹配 .基于此 ,本文设计了一种填充有Ｐ5 0 7萃淋树脂 ( 1 40目 )的超微柱 ( 0 6μｍ(ｉ.ｄ .)× 1 0ｍｍ) .它既可用作分离富集柱 ,又可作为ＥＴＶ ＩＣＰ…

A Miniaturization Solid-phase Extraction Technique Designed for Electrothermal Vaporization-Atomic Emission Spectrometry Determination

A new method of combination micro column packed with 2 ethylhexyl hydrogen 2 ethylhexyl phosphonate(P 507 ) extraction resin with electrothermal vaporization inductively coupled plasma atomic emission spectrometry(ETV ICP AES) for separation and determination of trace rare earth elements(lanthanum, europium, yttrium and ytterbium) has been developed. Various influencing factors, such as the acidity of solution, flow rate and the volume of the sample, the length of the micro column on the separation and the preconcentration are examined in detail, the effect of the existence of organic matrix and the pre ashing temperature on determination of rare earth elements by ETV ICP AES has also been studied.