Simultaneous Automatic Determination of Trace Amounts of Copper and Cobalt by Use of a Flow-through Sensor and First-derivative Spectrometry

The Analyst ◽  
1997 ◽  
Vol 122 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Elisa Vereda ◽  
Angel Rios ◽  
Miguel Valcarcel
Keyword(s):  
Automatic Determination ◽  
First Derivative ◽  
Flow Through ◽  
Derivative Spectrometry

scholarly journals Simultaneous determination of procaine hydrochloride, procainamide hydrochloride and lidocaine by molecular absorption spectrometry

2019 ◽  
pp. 318-324
Author(s):  
Nicoleta Mirela Marin ◽  
Gheorghe Batrinescu ◽  
Mihai Nita-Lazar ◽  
Luoana Florentina Pascu ◽  
Carol Blaziu Lehr
Keyword(s):  
Simultaneous Determination ◽  
Direct Method ◽  
Absorption Spectrometry ◽  
Procaine Hydrochloride ◽  
Zero Crossing ◽  
Multicomponent Analysis ◽  
First Derivative ◽  
Cramer’S Rule ◽  
Derivative Spectrometry

Two spectrometric methods have been developed for quantitative simultaneous determination of procaine hydrochloride (PH·HCl), procainamide hydrochloride (PHA·HCl) and lidocaine (Lid) from synthetic mixture. The methods employed are first derivative spectrometry, using zero crossing method and multicomponent analysis which is based on the additivity law. Using first derivative spectrometry, the wavelength selected for the quantitative determination of PH·HCl was 237 nm for Lid was 242 nm and for PHA·HCl was 290 nm in mixture. The method is linear when the concentration ranged between 6.62-9.93 μg/mL for PH·HCl, 6.43-9.64 for PHA·HCl and 5.56-8.35 for Lid. The multicomponent analysis is a direct method and involves the absorbance measurements of at three different wavelengths. The molar absorption coefficients values were calculated at each wavelength and the concentration of PH·HCl, PHA·HCl and Lid from mixture was determined by solving matrix using Cramer's rule. The recovery of each compound in mixture was calculated and it is 101.4 % for PH·HCl, 100.4 % for PHA·HCl and 98.4 % for Lid.

Automatic determination of ethylene glycol in anti-freeze solutions with a periodate-sensitive flow-through electrode

The Analyst ◽  
1980 ◽  
Vol 105 (1257) ◽  
pp. 1203 ◽  
Author(s):  
E. P. Diamandis ◽  
C. E. Efstathiou ◽  
T. P. Hadjiioannou
Keyword(s):  
Ethylene Glycol ◽  
Automatic Determination ◽  
Flow Through

scholarly journals Simultaneous Determination Of Atenolol And Hydrocholrothiazide In Tablets Formulation By Derivative Spectrometry

2020 ◽  
Vol 17 ◽  
pp. 73-79
Author(s):  
SAAD ANTAKLI ◽  
LEON NEJEM ◽  
MOUSTAFA ALABO JOUMAA
Keyword(s):  
Simultaneous Determination ◽  
Spectrophotometric Method ◽  
Correlation Coefficients ◽  
First Derivative ◽  
Derivative Spectrometry

The derivative spectrophotometric method was developed and applied for the simultaneous determination of Atenolol (ATE) and Hydrochlorothiazide (HCT) in Tablets formulations. The first derivative spectrophotometric (1DS) method was applied for the determination of (ATE) and (HCT), respectively. (ATE) was determined at 271.9 nm (1D 271.9) and (HCT) was determined at 279.3 nm (1D 279.3). Linearity showed a good correlation coefficients R2 = 0.9994 and R2 = 0.9989 for (ATE) and (HCT), respectively. Linearity ranges were (10 – 280)

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