Masqué N, Galià M, Marcé R M, Borrull F
Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Tarragona, Spain.
J Chromatogr A. 1998 Apr 17;803(1-2):147-55. doi: 10.1016/s0021-9673(97)01225-9.
A new chemically modified polymeric resin, with an o-carboxybenzoyl moiety, is developed to be used in the on-line solid-phase extraction (SPE) of some pesticides and phenolic compounds from aqueous samples, in order to obtain better breakthrough volumes than other commercial sorbents. The chemical introduction of this moiety improves the efficiency of SPE by providing better surface contact with aqueous samples. This synthesized sorbent enables higher volumes of sample to be concentrated for determining polar compounds. When analyzing real samples, tap and river waters, different quantities of sulphite were added to decrease the initial band due to fulvic and humic acids. The matrix peaks decreased and there were no losses in the studied compounds observed when 500 and 1000 microliters of 10% Na2SO3 solution for every 100 ml of sample were added to tap and river water, respectively.
一种带有邻羧基苯甲酰部分的新型化学改性聚合物树脂被研发出来，用于从水样中在线固相萃取（SPE）某些农药和酚类化合物，以便比其他商业吸附剂获得更好的穿透体积。该部分的化学引入通过与水样提供更好的表面接触来提高固相萃取的效率。这种合成吸附剂能够浓缩更高体积的样品以测定极性化合物。在分析实际样品（自来水和河水）时，添加不同量的亚硫酸盐以减少由于富里酸和腐殖酸导致的初始谱带。当分别向每100毫升自来水和河水中添加500微升和1000微升10%的Na2SO3溶液时，基质峰降低，且在所研究的化合物中未观察到损失。
