Determination of Carbofuran and 3‐Hydroxycarbofuran Residues in Coconut Water by Solid‐Phase Extraction and Liquid Chromatography with UV Detection

A reversed-phase high-performance liquid chromatography method combined with matrix solid-phase dispersion extraction for the determination of teflubenzuron, lufenuron and bifenthrin residues in lyophilized coconut water

“…The extraction method proposed was based on the SPE procedures developed and validated in our group (Brito et al, 2002;Ogawa et al, 2006). Preliminary investigations for optimization of the MSPD procedure for the extraction of pesticides from lyophilized coconut water were performed using lyophilized coconut water samples spiked with pesticides at 1.0 mg kg À1 , and C 18 -bonded silica, silica-gel, neutral alumina and Florisil as solid-phase sorbents, since the polarities of the sorbent and the elution solvent are known to be key factors in MSPD, determining both the efficiency of the extraction and the purity of the final extract (Barker, 2000a).…”

“…It avoids the drawbacks generally associated with liquid-liquid extraction, such as the use of large volumes of solvent, the occurrence of troublesome emulsions, and slow speed (Capriotti et al, 2010;García-Lopez et al, 2008). A review of the literature reveals only liquid-liquid extraction (LLE) and SPE methods for determination of pesticide residues in non-lyophilized coconut water (Brito et al, 2002;Ogawa et al, 2006). At our best knowledge, no multi-residue method based on MSPD followed by HPLC/UV has been currently proposed in the literature.…”

Flow‐injection determination of carbaryl and carbofuran based on KMnO4–Na2SO3 chemiluminescence detection

“…These include; spectrophotometry (3)(4)(5)(6), flow injection analysis (FIA) (7)(8)(9), fluorescence (10)(11)(12), HPLC-UV (13)(14)(15), GC-MS (16,17) and immunoassay (18). These methods are accurate and selective, but involve expensive instrumentation and are time consuming and have poor sample throughput.…”

Degradation kinetics of carbofuran insecticide in tomato fruits

“…17 Ogawa et al have developed a solid phase extraction technique with LC analysis using a UV detector for the determination of carbofuran and 3hydroxycarbofuran in coconut water and reported an LOD in the range of 0.008 to 0.01 ppm (μg g −1 ). 18 Appaiah et al have developed a spectrophotometric method to determine carbofuran residues in rice, wheat, jowar, and pigeon pea and reported the maximum absorbance at 475 nm. 19 Yongjia et al have employed a fluorospectrophotometric technique to determine carbofuran residues in vegetables and reported a detection limit of 0.025 mg kg -1 and linear dynamics in the range of 0.09-1.2 mg L −1 .…”