Selective and Sensitive Chemiluminescence Determination of MCPB: Flow Injection and Liquid Chromatography

Abstract

Two new chemiluminescence methods are described for the determination of herbicide MCPB.Firstly, a flow injection chemiluminescence (FI-CL) method is proposed. In this method, MCPB is photodegraded with a UV lamp and the photoproducts formed provide a great chemiluminescence signal when they react with ferricyanide in basic medium. Secondly, an HPLC chemiluminescence (HPLC-CL) method is proposed. In this method, before the photodegradation and CL reaction, the MCPB and other phenoxyacid herbicides are separated in a C18 column. The experimental conditions for the FI-CL and HPLC-CL methods are optimized. Both methods present good sensitivity, the detection limits being 0.12 µg L -1 and 0.1 µg L -1 (for FI-CL and HPLC-CL, respectively) when solid phase extraction is applied.Intra-and interday relative standard deviations are below 9.9%. The methods have been satisfactorily applied to the analysis of natural water samples. FI-CL method can be employed for the determination of MCPB in simple water samples and for the screening of complex water samples in a fast, economic and simple way. The HPLC-CL method is more selective, and allows samples that have not been resolved with the FI-CL method to be solved.

Photoinduced chemiluminescence determination of carbamate pesticides

“…Catalá-Icardo, M.; Meseguer-Lloret, S.; Torres-Cartas, S. (2016 A liquid chromatography method with post-column photoinduced chemiluminescence (PICL) detection is proposed for the simultaneous determination of eight carbamate pesticides, namely aldicarb, butocarboxim, ethiofencarb, methomyl, methiocarb, thiodicarb, thiofanox and thiophanate-methyl. After chromatographic separation, quinine (sensitizer) was incorporated and the flow passed through an UV lamp (67 s of irradiation time) to obtain the photoproducts, which reacted qith acidic Ce(IV) and provided a CL emission.…”

“…22 The development of new LC-CL methods applied to other families of pesticides is very interesting due to the great advantages of these methods in terms of sensitivity, selectivity and simplicity. This paper presents a simple, sensitive and selective method for determining eight carbamate pesticides in surface and ground water samples.…”

“…No CL method based on the reaction with strong oxidants has been previously described for carbamate pesticides, and it only has been occasionally employed for other pesticides, like organothiophosphorus, 20 pyrethroids 21 or phenoxyacids. 22 The development of new LC-CL methods applied to other families of pesticides is very interesting due to the great advantages of these methods in terms of sensitivity, selectivity and simplicity. This paper presents a simple, sensitive and selective method for determining eight carbamate pesticides in surface and ground water samples.…”

A review of recent developments based on chemiluminescence detection systems for pesticides analysis

“…Similarly, Meseguer‐Lloret et al . [ 38 ] proposed a method using the same concept for analysis of the 4‐(4‐chloro‐ o ‐tolyloxy)butyric acid (MCPB) herbicide in water samples. First, MCPB and other phenoxyacid herbicides were separated on a C18 column followed by photodegradation of the analyte under a UV lamp and then reaction of the photodegraded MCPB with ferricyanide in basic medium to produce CL emission.…”

A Sensitive Photometric Procedure for Cobalt Determination in Water Employing a Compact Multicommuted Flow Analysis System

“…[3][4][5][6][7]10,12 These difficulties can be overcome using automatic methodologies, such as flow injection analysis (FIA). [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] This process allows sample and reagent solution manipulations to be performed in a closed environment, thus minimizing the possibility of contamination, which is appropriate when the analysis involves very diluted samples. Exploiting this feature, analytical procedures involving analyte pre-concentration in many sample matrices have been proposed.…”