Results 11 to 20 of about 455,062 (389)
Drug Analytical Research, 2017 Analytical techniques based on Ultraviolet (UV) spectrophotometry are widely used in pharmaceutical analysis, because they are simple and inexpensive. The choice of pH is critical in the development of univariate methods for pharmaceutical quantitation ...
Fabiana E.B. da Silva +5 more
doaj +10 more sources
Diagnosis of Smith-Lemli-Opitz syndrome by ultraviolet spectrophotometry [PDF]
Brazilian Journal of Medical and Biological Research, 2003 Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive disorder due to an inborn error of cholesterol metabolism, characterized by congenital malformations, dysmorphism of multiple organs, mental retardation and delayed neuropsychomotor development ...
F.B. Scalco +4 more
doaj +2 more sources
Properties of the ionized gas in HH202. II: Results from echelle spectrophotometry with UVES [PDF]
, 2009 We present results of deep echelle spectrophotometry of the brightest knot of the HH202 in the Orion Nebula --HH202-S-- using the ultraviolet Visual Echelle Spectrograph (UVES). The high spectral resolution has permitted to separate the component associated with the ambient gas from that associated with the gas flow.
A. Mesa‐Delgado +7 more
arxiv +3 more sources
Quantitative detection of β-glucans in Cordyceps species using a validated Congo red assay [PDF]
Scientific Reportsβ-Glucan is extensively utilized in the food industry for its functional benefits, including blood glucose and lipid regulation, enhanced food texture, and a prolonged shelf life.
Haiwen Xia +7 more
doaj +2 more sources
Hexachlorophene in Cosmetics by Partition Chromatography and Ultraviolet Spectrophotometry [PDF]
Journal of AOAC INTERNATIONAL, 1974 Abstract Five samples at 3 levels of hexachlorophene concentration were analyzed by 6 collaborators. Results show recoveries of 79—103% for samples containing from 1 to 10 mg hexachlorophene. The standard deviation varied from 0.039 to 0.33 and the coefficient of variance ranged from 1.55 to 9.77%. The method has been adopted as official
Clifton H Wilson
openalex +4 more sources
Sequential injection analysis determination of sulphate in wastewaters by ultraviolet-spectrophotometry [PDF]
Journal of the Brazilian Chemical Society, 2000 A sequential injection analysis system based on the formation of the cation FeSO4+ and the spectrophotometric measuring of the absorbance at 355 nm has been developed for the determination of sulphate in wastewaters.
Lapa Rui A. S. +2 more
doaj +2 more sources
Chemical and pharmaceutical bulletin, 2016 A high-performance liquid chromatography-ultraviolet spectrophotometry (HPLC-UV) method for the determination of meloxicam (MEL) and meloxicam metabolites (5'-hydroxy meloxicam (5-HMEL) and 5'-carboxy meloxicam (5-CMEL)) has been developed.
Aoi Miyamoto +2 more
openalex +3 more sources
Determination of sun protection factor (SPF) of sunscreens by ultraviolet spectrophotometry [PDF]
, 2004 The aim of this research was to determine the sun protection factor (SPF) of sunscreens emulsions containing chemical and physical sunscreens by ultraviolet spectrophotometry. Ten different commercially available samples of sunscreen emulsions of various
Elizângela Abreu Dutra +3 more
openalex +2 more sources
Improved ultraviolet spectrophotometry of serum theophylline.
Clinical Chemistry, 1978 Abstract We present an improved method for ultraviolet spectrophotometry of theophylline in serum. We studied various extraction techniques aimed at eliminating interferences from co-extractable serum constituents. In the resulting modified procedure, 1 ml of serum is required and a salt-solvent pair of ammonium sulfate and chloroform ...
K Blum, P Carter, J E Wallace
openaire +4 more sources
Determination of food additive theaflavins by ultraviolet spectrophotometry
Zhongguo shipin weisheng zazhi, 2022 ObjectiveTo establish a method for the determination of food additive theaflavins by ultraviolet spectrophotometry.MethodsAfter dissolved in water， the sample solution was extracted with ethyl acetate and 2.5% sodium bicarbonate solution in turn.
ZHANG Haihong +5 more
doaj +1 more source