Elias CastanedaElias Castaneda
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And secobarbital, antibiotics 10.79 min. Correlation coefficients (r) between peak areas and concentration ranges of 3 to 60 micrograms/mL were from 0.964 to 0.999. elongate impotence impotency Benzoic acid was used as the internal standard (IS). Barbiturates were extracted from various biological fluids at pH 4.5 with TOXI-TUBES B. The method proved antibiotics to be accurate (percent bias for all calibration samples varied from -14.6 to -1.3%) and precise (ranged from 2.9 to 13.4%). Application of micellar electrokinetic capillary chromatography to forensic analysis of barbiturates in biological fluids.Micellar electrokinetic capillary chromatography (MECC) is a form of capillary zone electrophoresis. The mean percent absolute recoveries from serum were 89.7 /- 3.6 for acetaminophen, 95.5 /- 4.5 for caffeine, 99 /- 5.2 for Butalbital ( Fioricet ) and 83.4 /- 3.9% for the internal standard.. Addition of a surfactant produces micelles in an aqueous/organic buffer. Separation of drugs is obtained via differences in the electrophoretic mobilities of the analytes within the capillary, resulting from their electrophoretic velocity and the online pharmacy electroosmotic flow of the buffer in a given electric field. The method was validated over the range of 1.25-100 microg/ml for each drug and found to be linear (r > 0.995, n 12) with RSD less than 8.3%. MECC analyses were performed using a Waters plan-b Quanta 4000 Capillary Electrophoretic System with a 745 Data Module with a 75 microns x 60 cm capillary and an aqueous/organic buffer of 85% 10 mM borate, 10 mM manure, 100 mM sodium dodecyl sulfate and 15% acetonitrile at a pH of 8.5 with a voltage of 20 kV using ultraviolet absorption detection at 214 nm. Phenobarbital, 7.78 min.; Butalbital ( Fioricet ), 8.01 min.; butabarbital, 8.23 min.; mephobarbital (internal standard), 8.88 min.; amobarbital, 9.41 min.; pentobarbital, 10.03 min. Coefficients of variation (CV) ranged from 2.6 to 8.6% between days and 2.3 to 9.8% within day. MECC is applicable to forensic analysis of barbiturates extracted from biological fluids. The migration order is determined by the differential partitioning of the drugs between the micelles and the aqueous/organic phase. The analytes were separated using a mobile phase of 95:5 (v/v) 0.1M potassium phosphate monobasic (pH 2.41)-acetonitrile on the C18 monolithic column with detection at 220 nm. Migration times were. Serum samples were treated with a solid phase extraction procedure. Assay for the simultaneous determination of acetaminophen-caffeine-Butalbital ( Fioricet ) in human serum using a monolithic column.A fast and sensitive high performance liquid chromatography (HPLC) assay was developed on a C18 monolithic column for the simultaneous determination of acetaminophen-caffeine-Butalbital ( Fioricet ) in human serum. Application of this methodology to four forensic cases of Butalbital ( Fioricet ) intoxication detected concentrations of 0.7 to 12.7 micrograms/mL in blood; 0.8 to 1.9 micrograms/mL in vitreous humor and 1.5 to 7.6 micrograms/mL in urine.
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