On-site solid phase extraction and HPLC determination of chloramphenicol in surface water and sewage

2013 ◽  
Vol 5 (5) ◽  
pp. 1150 ◽  
Author(s):  
Sheng Liu ◽  
Xian-Zheng Wu ◽  
Zi-Hui Gao ◽  
Fang Jiao
Keyword(s):  
Surface Water ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Hplc Determination ◽  
Phase Extraction

Determination of rhodamine wt in surface water by solid-phase extraction and HPLC with fluorescence detection

1991 ◽  
Vol 25 (7) ◽  
pp. 883-890 ◽  
Author(s):  
J.W. Hofstraat ◽  
M. Steendijk ◽  
G. Vriezekolk ◽  
W. Schreurs ◽  
G.J.A.A. Broer ◽  
...  
Keyword(s):  
Surface Water ◽  
Solid Phase Extraction ◽  
Fluorescence Detection ◽  
Solid Phase ◽  
Phase Extraction ◽  
Rhodamine Wt

Solid-phase extraction and HPLC determination of fluoroquinolones in surface waters

2009 ◽  
Vol 32 (17) ◽  
pp. 3020-3028 ◽  
Author(s):  
Michela Sturini ◽  
Andrea Speltini ◽  
Luca Pretali ◽  
Elisa Fasani ◽  
Antonella Profumo
Keyword(s):  
Solid Phase Extraction ◽  
Surface Waters ◽  
Solid Phase ◽  
Hplc Determination ◽  
Phase Extraction

HPLC determination of aflatoxin M1 in liquid milk and milk powder using solid phase extraction on OASIS HLB

Food Control ◽  
2012 ◽  
Vol 28 (1) ◽  
pp. 131-134 ◽  
Author(s):  
Yutang Wang ◽  
Xuebo Liu ◽  
Chunxia Xiao ◽  
Zhouli Wang ◽  
Jianguo Wang ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Milk Powder ◽  
Hplc Determination ◽  
Aflatoxin M1 ◽  
Phase Extraction ◽  
Oasis Hlb ◽  
Liquid Milk

scholarly journals Cost-Effective Detection of Perfluoroalkyl Carboxylic Acids with Gas Chromatography: Optimization of Derivatization Approaches and Method Validation

2019 ◽  
Vol 17 (1) ◽  
pp. 100 ◽  
Author(s):  
Zhen Li ◽  
Hongwei Sun
Keyword(s):  
Gas Chromatography ◽  
Surface Water ◽  
Solid Phase Extraction ◽  
Carboxylic Acids ◽  
Water Samples ◽  
Solid Phase ◽  
Cost Effective ◽  
Phase Extraction ◽  
Surface Water Samples

The reliable quantification of perfluoroalkyl carboxylic acids (PFCAs) in environmental samples like surface water by using gas chromatography (GC) remains challenging because the polar PFCAs call for derivatization before injection and problems involving the integration of sample pretreatment and derivatization procedures. Here we proposed a cost-effective method for the GC based determination of C4–C12 PFCAs in surface water samples by integrating solid phase extraction and PFCAs anilide derivatization. First, we assessed the performance of different PFCAs derivatization methods, namely esterification and amidation. Esterification was unable to derivatize C4–C6 PFCAs. On the contrary, amidation procedures by using 2,4-difluoroaniline (DFA) and N,N′-dicyclohexylcarbodiimide (DCC) could successfully transform all the PFCA analogs to produce anilide derivatives, which could be easily detected by GC. Then the reaction conditions in the amidation approach were further optimized by using orthogonal design experiments. After optimizing the instrumental parameters of GC, the limits of detection (LOD) of this derivatization method were determined to be 1.14–6.32 μg L−1. Finally, in order to establish an intact method for the quantification of PFCAs in surface water samples, solid phase extraction (SPE) was used for extraction and cleanup, which was further integrated with the subsequent amidation process. The SPE-amidation-GC method was validated for application, with good accuracy and precision reflected by the PFCAs recoveries and derivatization of triplicates. The method reported here could provide a promising and cost-effective alternative for the simultaneous determination of C4–C12 PFCAs in environmental water samples.

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