SIMPLE AND RAPID FLOW-INJECTION SPECTROPHOTOMETRIC DETERMINATION OF CARBARYL AFTER LIQUID-LIQUID-EXTRACTION

被引：46
作者：
KHALAF, KD [1 ]
MORALESRUBIO, A [1 ]
DELAGUARDIA, M [1 ]
机构：
[1] UNIV VALENCIA,DEPT ANALYT CHEM,50 DR MOLINER ST,E-46100 BURJASSOT,SPAIN
来源：
ANALYTICA CHIMICA ACTA | 1993年 / 280卷 / 02期
关键词：
FLOW INJECTION; UV VISIBLE SPECTROPHOTOMETRY; CARBARYL; PESTICIDES; WATERS;
D O I：
10.1016/0003-2670(93)85126-5
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A simple procedure was developed for the spectrophotometric determination of carbaryl and its hydrolysis product 1-naphthol in water. These compounds are extracted into xylene and back-extracted, as the 1-naphtholate, with 0.2 M NaOH. A 600-mul volume of the alkaline extract is injected into a flow analysis manifold which provides the reaction between naphtholate and 50 mug ml-1 p-aminophenol solution in the presence of 0.004 M KIO4 and spectrophotometric measurement is carried out at 596 nm. The method provides a limit of detection of 26.5 ng ml-1 carbaryl and a sample frequency of 110 injections per hour. Recoveries in different types of matrices vary from 95 to 102%.
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页码：231 / 238
页数：8
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