Matrix solid-phase dispersion for the liquid chromatographic determination of phenolic acids in Melissa officinalis

2003 ◽  
Vol 983 (1-2) ◽  
pp. 271-275 ◽  
Author(s):  
Alica Žiaková ◽  
Eva Brandšteterová ◽  
Eva Blahová
Keyword(s):  
Phenolic Acids ◽  
Solid Phase ◽  
Chromatographic Determination ◽  
Melissa Officinalis ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Matrix Solid-Phase Dispersion Isolation and Liquid Chromatographic Determination of Oxolinic Acid in Channel Catfish (Ictalurus punctatus) Muscle Tissue

1992 ◽  
Vol 75 (3) ◽  
pp. 428-432 ◽  
Author(s):  
Herman H Jarboe ◽  
Kevin M Kleinow
Keyword(s):  
Muscle Tissue ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Solid Phase ◽  
Chromatographic Determination ◽  
Oxolinic Acid ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract Matrix solid-phase dispersion Isolation and liquid chromatographic techniques were developed to quantify oxolinic acid (OA) and OA-related metabolites in channel catfish (Ictalurus punctatus) muscle tissue and bile. Mean percent recovery, correlation coefficient, and inter- and intra-assay variabilities were 82.8 ±15.0%, 0.996 ±0.004,12.5 ±8.9%, and 1.22%, respectively, for OA Isolated from fortified muscle tissue. Using the methodologies described in the current study, incurred OA In muscle tissue and 4 OA-related metabolites were Isolated In the bile of dosed catfish.

Matrix Solid-Phase Dispersion (MSPD) Isolation and Liquid Chromatographic Determination of Oxytetracycline, Tetracycline, and Chlortetracycline in Milk

1990 ◽  
Vol 73 (3) ◽  
pp. 379-384 ◽  
Author(s):  
Austin R Long ◽  
Lily C Hsieh ◽  
Marsha S Malbrouh ◽  
Charles R Short ◽  
Steven A Barker
Keyword(s):  
Solid Phase ◽  
Correlation Coefficients ◽  
Chromatographic Determination ◽  
Average Percentage ◽  
Phase Dispersion ◽  
Fortified Milk ◽  
Photodiode Array ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A multlresldue method for the isolation and liquid chromatographic determination of oxytetracycline (OTC), tetracycline (TC), and chlortetracycllne (CTC) antibiotics In milk Is presented. Blank and tetracycline (OTC, TC, and CTC) fortified milk samples (0.5 mL) were blended with octadecylsllyl (C18, 40 /an, 18% load, endcapped, 2 g) derivatized silica packing material containing 0.05 g each of oxalic acid and dlsodlum ethylenedlamlnetetraacetlc. A column made from the C18/milk matrix was first washed with hexane (8 mL), following which the tetracyclines were eluted with ethyl acetate-acetonltrlle (1 + 3; v/v). The eluate contained tetracycline analytes that were free from Interfering compounds when analyzed by liquid chromatography with UV detection (photodiode array, 365 nm). Correlation coefficients of standards curves for Individual tetracycline isolated from fortified samples were linear (from 0.982 ± 0.009 to 0.996 ± 0.004) with average percentage recoveries from 63.5 to 93.3 for the concentration range (100,200,400,800,1600, and 3200 ng/ mL) examined. The Inter-assay variability ranged from 8.5 ± 2.4% to 20.7 ± 13.0% with an Intra-assay variability of 1.0- 9.3%.

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