High-sensitivity thiocyanate spectrophotometric method for determination of perrhenate, an analogue of radioactive pertechnetate, under acidic condition

2018 ◽  
Vol 73 (5) ◽  
pp. 1093-1101 ◽  
Author(s):  
Hui Hu ◽  
Long-Li Sun ◽  
Yan-Ling Gao ◽  
Tian Wang ◽  
Yue-Fei Zhang ◽  
...  
Keyword(s):  
Spectrophotometric Method ◽  
High Sensitivity ◽  
Acidic Condition

Improved determination of cytochrome b5 in human erythrocytes.

1984 ◽  
Vol 30 (8) ◽  
pp. 1344-1347 ◽  
Author(s):  
A Kaftory ◽  
E Hegesh
Keyword(s):  
Spectrophotometric Method ◽  
Cytochrome B5 ◽  
High Sensitivity ◽  
Human Erythrocytes ◽  
Healthy Individuals ◽  
Mean Values

Abstract A sensitive, precise enzymic/spectrophotometric method for determining cytochrome b5 in small amounts of blood is described. Mean values for healthy individuals, ages 20 to 70 years, were 0.26 (SD 0.03) mumol per liter of erythrocytes or 0.87 (SD 0.14) nmol per gram of hemoglobin. We believe the assay is preferable to methods described hitherto, primarily because of its high sensitivity.

Spectrophotometric Method for the Assay of Chlorhexiidine Acetate

2014 ◽  
Vol 912-914 ◽  
pp. 321-324
Author(s):  
Yan Hong Lei
Keyword(s):  
Spectrophotometric Method ◽  
High Sensitivity ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Addition Method ◽  
Ultraviolet Spectrophotometry ◽  
Good Linear ◽  
Sensitivity And Selectivity

To establish the determination of the content of chlorhexiidine acetate by ultraviolet spectrophotometry .The spectra (range: λ=200~320 nm) were processed. The linear ranges of chlorhexidine acetate was at 2~ 20 μg mL-1 .the chlorhexiidine acetate showed good linear correlation.The ultraviolet spectrophotometry data of the samples were also used to evaluate the samples quantitative composition.It was shown that recovery of the method by standard addition method was respectively valued 99.55% for chlorhexiidine acetate .The method was simple,reliable,accurate,reproducible with high sensitivity and selectivity.

scholarly journals Spectrophotometric method for simultaneous determination of valsartan and substances from the group of statins in binary mixtures

2017 ◽  
Vol 67 (4) ◽  
pp. 463-478 ◽  
Author(s):  
Mariusz Stolarczyk ◽  
Anna Apola ◽  
Anna Maślanka ◽  
Anna Kwiecień ◽  
Włodzimierz Opoka
Keyword(s):  
Simultaneous Determination ◽  
Binary Mixtures ◽  
Spectrophotometric Method ◽  
Pharmaceutical Preparations ◽  
High Sensitivity ◽  
Derivative Spectrophotometry

Abstract Applicability of derivative spectrophotometry for the determination of valsartan in the presence of a substance from the group of statins was checked. The obtained results indicate that the proposed method may be effective by using appropriate derivatives: for valsartan and fluvastatin - D1, D2 and D3, for valsartan and pravastatin - D1 and D3, for valsartan and atorvastatin - D2 and D3. The method was characterized by high sensitivity and accuracy. Linearity was maintained in the following ranges: 9.28-32.48 mg mL-1 for valsartan, 8.16-28.56 mg mL-1 f or fluvastatin, 14.40-39.90 mg mL-1 for atorvastatin and 9.60-48.00 mg mL-1 for pravastatin. Determination coefficients were in the range of 0.989-0.999 depending on the analyte and the order of derivative. The precision of the method was high with RSD from 0.1 to 2.5 % and recovery of individual components was within the range of 100 ± 5 %. The developed method was successfully applied to the determination of valsartan combined with fluvastatin, atorvastatin and pravastatin in laboratory prepared mixtures and in pharmaceutical preparations.

Spectrophotometric Method for the Assay of Aspirin

2014 ◽  
Vol 602-605 ◽  
pp. 2097-2100
Author(s):  
Yan Hong Lei
Keyword(s):  
Spectrophotometric Method ◽  
High Sensitivity ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Addition Method ◽  
Ultraviolet Spectrophotometry ◽  
Selective Method ◽  
Good Linear ◽  
Sensitivity And Selectivity

A selective method was developed for the determination of aspirin by Spectrophotometric method .The spectra (range: λ=200~320 nm) were processed. The linear ranges of aspirin was at 50.28 ~ 125.7μg • mL-1 .the aspirin showed good linear correlation.The ultraviolet spectrophotometry data of the samples were also used to evaluate the samples’ quantitative composition.It was shown that recovery of the method by standard addition method was respectively valued 102.06% for aspirin .The method was simple,reliable,accurate,reproducible with high sensitivity and selectivity.

scholarly journals A New Spectrophotometric Method for Analysis of Allopurinol in Aqueous Solutions and Pharmaceutical Preparations

2009 ◽  
Vol 6 (2) ◽  
pp. 309-314
Author(s):  
Baghdad Science Journal
Keyword(s):  
Absorption Spectrum ◽  
Aqueous Solutions ◽  
Spectrophotometric Method ◽  
Calibration Curve ◽  
Pharmaceutical Preparations ◽  
High Sensitivity ◽  
Good Stability ◽  
Optimum Conditions ◽  
Wide Range

A new method for determination of allopurinol in microgram level depending on its ability to reduce the yellow absorption spectrum of (I-3) at maximum wavelength ( ?max 350nm) . The optimum conditions such as "concentration of reactant materials , time of sitting and order of addition were studied to get a high sensitivity ( ? = 27229 l.mole-1.cm-1) sandal sensitivity : 0.0053 µg cm-2 ,with wide range of calibration curve ( 1 – 9 µg.ml-1 ) good stability (more then24 hr.) and repeatability ( RSD % : 2.1 -2.6 % ) , the Recovery % : ( 98.17 – 100.5 % ) , the Erel % ( 0.50 -1.83 % ) and the interference's of Xanthine , Cystein , Creatinine , Urea and the Glucose in 20 , 40 , 60 fold of analyate were also studied .

scholarly journals Leishman’s Dye as a Novel Reagent in Spectrophotometric Determination of Chloramphenicol

2020 ◽  
Vol 10 (02) ◽  
pp. 250-254
Author(s):  
Jamal Sudad Raeek Othman Nabeel Sabeeh
Keyword(s):  
Spectrophotometric Method ◽  
Acidic Medium ◽  
Pharmaceutical Preparations ◽  
High Sensitivity ◽  
Pharmaceutical Formulations ◽  
Molar Absorptivity ◽  
Sensitivity Index ◽  
Oxidizing Agent ◽  
Drug Compounds

By reviewing the literature, there is no indication concerning the use of Leishman’s dye in evaluating drug compounds by dye-color bleaching; hence, it is the first attempt to use Leishman’s dye as a novel reagent in the estimation of chloramphenicol (CAP) by an indirect spectrophotometric method in bulk and in its pharmaceutical preparations. The method includes the use of a great amount of N-bromosuccinamide (NBS) in the acidic medium as an oxidizing agent of the drug under investigation (CAP), and then using the residual of NBS for Leishman’s dye color bleaching. The absorbance has been measured at 622 nm (the maximum absorption of Leishman’s dye). A linear relationship was obtained for the Beer’s law with the concentration ranges from 10 to 250 μg/10 mL with acceptable values of molar absorptivity 0.58 × 104 L.mol-1.cm-1 and 0.055 μg.cm-2 of Sandell’s sensitivity index, which mean a high sensitivity. An approved estimation of CAP in its various pharmaceutical formulations was found.

Spectrophotometric Method for the Assay of Norfloxacin Lactate

2014 ◽  
Vol 989-994 ◽  
pp. 993-996
Author(s):  
Yan Hong Lei
Keyword(s):  
Spectrophotometric Method ◽  
High Sensitivity ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Addition Method ◽  
Selective Method

A selective method was developed for the determination of norfloxacin lactate by Spectrophotometric method. The method was simple with high sensitivity and selectivity.It was shown that recovery of the method by standard addition method was respectively valued 102.05% for norfloxacin lactate

Spectrophotometric Method in the Determination of Aminophylline Content

2014 ◽  
Vol 602-605 ◽  
pp. 2395-2398
Author(s):  
Yan Hong Lei
Keyword(s):  
Spectrophotometric Method ◽  
High Sensitivity ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Addition Method ◽  
Selective Method

A selective method was developed for the determination of aminophylline by Spectrophotometric method. The method was simple with high sensitivity and selectivity.It was shown that recovery of the method by standard addition method was respectively valued 99.21% for aminophylline.

Sign in / Sign up

Export Citation Format

Share Document