DETERMINATION OF A LINEAR ALKYLBENZENESULFONATE AND ITS BIODEGRADATION INTERMEDIATES IN SEA WATER USING SOLID-PHASE EXTRACTION AND RP-HPLC WITH UV DETECTION

1999 ◽  
Vol 22 (16) ◽  
pp. 2511-2524 ◽  
Author(s):  
L. Sarrazin ◽  
W. Wafo ◽  
P. Rebouillon
Keyword(s):  
Solid Phase Extraction ◽  
Sea Water ◽  
Solid Phase ◽  
Uv Detection ◽  
Phase Extraction ◽  
Linear Alkylbenzenesulfonate ◽  
Rp Hplc

scholarly journals Determination of Flumorph Residues in Vegetables, Soil, and Natural Water by Solid-Phase Extraction Cleanup and High-Performance Liquid Chromatography with UV Detection

2008 ◽  
Vol 91 (6) ◽  
pp. 1459-1466 ◽  
Author(s):  
Ji-Ye Hu ◽  
Yu-Chao Zhang ◽  
Hai Yan
Keyword(s):  
Solid Phase Extraction ◽  
Natural Water ◽  
High Performance ◽  
Solid Phase ◽  
Residue Analysis ◽  
Reversed Phase ◽  
Uv Detection ◽  
Phase Extraction ◽  
Limit Of Quantification

Abstract A method for high-performance liquid chromatographic (HPLC) determination of flumorph residues in cucumber, tomato, soil, and natural water was developed and validated. Primary secondary amine or octadecylsilyl (C18) solid-phase extraction cartridges were used for sample preparation. Reversed-phase HPLC with UV detection was used for separation and quantification of the pesticide. The combined cleanup and chromatographic method steps were sensitive and reliable for simultaneous determination of residues of the 2 isomers of flumorph in the studied samples. This method is characterized by recovery >97.9, coefficient of variation <6.2, and limit of quantification of 0.01 mg/kg, in agreement with directives for method validation in residue analysis. Flumorph residues in the samples were further confirmed by HPLC/mass spectrometry. The proposed method is fast, easy to perform, and could be used for monitoring of pesticide residues.

Simultaneous magnetic dispersive micro solid phase extraction of valsartan and atorvastatin using a CMC-coated Fe3O4 nanocomposite prior to HPLC-UV detection: multivariate optimization

2019 ◽  
Vol 43 (43) ◽  
pp. 16950-16959 ◽  
Author(s):  
Ali Azadi ◽  
Shahin Ahmadi
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Biological Fluids ◽  
Uv Detection ◽  
Phase Extraction ◽  
Multivariate Optimization ◽  
Uv Detector ◽  
Practical Procedure

In this study, a sensitive, rapid, accurate and practical procedure is established for determination of atorvastatin and valsartan from human biological fluids by dispersive micro solid phase extraction (D-μ-SPE) combined with HPLC-UV detector.

scholarly journals Determination of Amoxicillin in Trout by Liquid Chromatography with UV Detection after Derivatization

1999 ◽  
Vol 82 (6) ◽  
pp. 1345-1352 ◽  
Author(s):  
Lambert K Sørensen ◽  
Heļga Hansen ◽  
Lena Snor
Keyword(s):  
Solid Phase Extraction ◽  
Muscle Tissue ◽  
Solid Phase ◽  
Reversed Phase ◽  
Uv Detection ◽  
Phase Extraction ◽  
Phase Gradient ◽  
Repeatability Standard Deviation ◽  
Liquid Chromatographic

Abstract A liquid chromatographic (LC) method based on solid-phase extraction was developed for determination of amoxicillin in muscle tissue of rainbow trout. The compound was extracted in an aqueous solution by precipitation of organic material with a mixture of sulfuric acid and sodium tungstate. The extract was processed by solid-phase extraction on an end-capped phenyl sorbent, and concentrated on a divinylbenzene-co-ΛN-vinylpyrrolidone polymeric sorbent. The extract was derivatized and analyzed by reversed-phase gradient LC on a C18 column with UV detection at 323 nm. The method detection limit was 2.9 μg/kg. Mean recovery in muscle was 80.5% (range 10-200 μg/kg). The method was applied to fillets from trout offered feed containing amoxicillin in an aquaculture pilot plant. Amoxicillin was detected in muscle tissue shortly after administration but not 3 weeks later. The relative repeatability standard deviation for incurred residues in muscle tissue was 6.4% (range 11-143 μg/kg).

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