نتایج جستجو برای: fluorimetric determination

تعداد نتایج: 251869  

Journal: :Journal of pharmaceutical and biomedical analysis 2002
Nawal A A Alarfaj

Two simple and highly sensitive fluorimetric methods have been developed for the determination of isoxsuprine hydrochloride in bulk, in dosage forms and in biological fluids. The first method involves the direct measurement of the native fluorescence of the drug in the concentration range 0.4-4.0 microg ml(-1), the second method is based on the oxidation of isoxsuprine HCl with cerium(IV) follo...

Journal: :Journal of pharmaceutical and biomedical analysis 1995
C Cruces Blanco A Segura Carretero A Fernández Gutierrez M Román Ceba

A sensitive and inexpensive micellar-enhanced synchronous-derivative spectrofluorimetric method is described for the determination of folic acid in pharmaceutical preparations. The method is based upon derivatization of the vitamin with fluorescamine in acid solution and enhancement of the fluorescence with a surfactant. Linear fluorimetric analytical curves were obtained for folic acid concent...

2016
José Ramón Alonso-Fernández

The standard method of primary neonatal screening for congenital adrenal hyperlasia (CAH), determination of 17-hydroxyprogesterone (17OHP) in heelprick blood, is the object of recurrent controversy because of its poor diagnostic and economic efficiency. The superior ability of urinary pregnanetriolone levels to discriminate between infants with and without classical CAH has been known for some ...

Journal: :Journal of clinical chemistry and clinical biochemistry. Zeitschrift fur klinische Chemie und klinische Biochemie 1981
F Plavsić B Vrhovac A Radosević I Dvorzak

The fluorimetric and microbiological methods for the determination of serum and urine cephalexin were compared with the aid of coded samples in two different laboratories. The coefficient of correlation between the two methods for serum cephalexin was 0.94. At urine cephalexin concentrations above 0.5 g/l, the coefficient of correlations between two methods was 0.83. At lower concentrations (0....

Journal: :Hacettepe Journal of Biology and Chemistry 2021

Tiyol gruplar? içeren aminoasitler olarak Sistein (Cys) ve homosistein (Hcy) biyolojik sistemlerde birçok önemli rol oynamaktad?r. HCy’nin plazma seviyesinin, kardiyovasküler Alzheimer gibi baz? hastal?klar?n bir göstergesi oldu?u bilinmektedir. Plazmadaki Cys eksikli?i karaci?er hasar?, kas ya? kayb?, cilt lezyonlar?, yava? büyüme vb. Gibi durumlarla ili?kilidir. Bu çal??mada, seviyelerinin be...

Journal: :Biomedical chromatography : BMC 2012
F G Sánchez A Navas Díaz E Sánchez Torreño A Aguilar I Medina Lama M Algarra

A facile approach for the enantiomeric excess determination of enantiomeric mixtures without the necessity of pure enantiomer standards is presented. Promethazine and trimeprazine commercial nonracemic mixtures were used as cases study to probe the validity of the method. Chromatographic resolutions obtained with a chiral column AGP in reverse phase mode were 1.32-1.16 (promethazine) and 1.20-0...

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