Development of an Extractive Spectrophotometric Method for the Determination of Copper(II) in Leafy Vegetable and Pharmaceutical Samples Using Pyridoxal-4-phenyl-3-thiosemicarbazone (PPT)

2005 ◽  
Vol 53 (14) ◽  
pp. 5492-5498 ◽  
Author(s):  
L. Subramanyam Sarma ◽  
J. Rajesh Kumar ◽  
K. Janardhan Reddy ◽  
A. Varada Reddy
Keyword(s):  
Spectrophotometric Method ◽  
Leafy Vegetable ◽  
Pharmaceutical Samples ◽  
Determination Of Copper

scholarly journals Spectrophotometric Method for the Determination of Copper (II) in Leafy Vegetable, Soil, Alloys and Pharmaceutical Samples Using 3-Methylthiophene-2-Carbaxaldehyde-3-Thiosemicarbazone (3-MTAT)

2015 ◽  
Vol 51 ◽  
pp. 105-114
Author(s):  
G. Sreenivasula Reddy ◽  
P. Raveendra Reddy
Keyword(s):  
Spectrophotometric Method ◽  
Molar Absorptivity ◽  
Leafy Vegetable ◽  
Pharmaceutical Samples ◽  
Vegetable Soil ◽  
Relative Standard ◽  
Beer's Law ◽  
Beer’S Law ◽  
Determination Of Copper

A highly sensitive spectrophotometric method has been developed for the determination of copper (II) using 3-methylthiophene-2-carbaxaldehyde-3-thilosemicarbazone (3-MTAT) as an analytical reagent. The 3-MTAT forms reddish brown species of copper (II) at a pH range of 5.0-7.0. The Cu (II)-3-MTAT complex shows maximum absorbance at 430 nm, with molar absorptivity and Sandell’s sensitivity being 1.6 x 104 L Mol-1 Cm-1 and 3.6 x 10-3 μg cm-2 respectively. The system obeys Beer’s law in the range of 0.35-3.53mg/L. The regression coefficient of the Beer’s law straight line is 0.338, and the correlation coefficient is 0.999. The detection limit of the method is 0.021 μg mL-1. Most of the common metal ions generally found associated with copper do not interfere. The repeatability of the method was checked by finding the relative standard deviation. The developed method has been successfully employed for the determination of copper (II) in leafy vegetable and pharmaceutical samples and this method was inter comparison of experimental values using AAS.

Collaborative Study Using Atomic Absorption Spectrophotometry for the Determination of Copper in Alcoholic Products

1967 ◽  
Vol 50 (2) ◽  
pp. 338-339
Author(s):  
Duane H Strunk ◽  
A A Andreasen
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Good Precision ◽  
Absorption Method ◽  
Standard Curve ◽  
Absorption Spectrophotometry ◽  
Determination Of Copper

Abstract A collaborative study was conducted on the 'atomic absorption spectrophotometric method for measuring the concentration of copper in alcoholic products. In this method, the samples are aspirated directly into the burner of the instrument, and the absorhance values are converted to ppm copper by reference to a standard curve. Data show good precision and are comparable to those obtained by the ZDBT method. It is recommended that the atomic absorption method be adopted as official, first action.

scholarly journals Third Derivative Spectrophotometric Method for Simultaneous Determination of Copper and Nickel Using 6-(2-Naphthyl)-2, 3-dihydro-1,2,4- triazine-3-thione

2011 ◽  
Vol 8 (2) ◽  
pp. 587-593 ◽  
Author(s):  
Maliheh Barazandeh Tehrani ◽  
Effat Souri
Keyword(s):  
Simultaneous Determination ◽  
Spectrophotometric Method ◽  
Limit Of Detection ◽  
Alloy Sample ◽  
Zero Crossing ◽  
Determination Of Nickel ◽  
Analytical Reagent ◽  
Third Derivative ◽  
Determination Of Copper

A simple and sensitive derivative spectrophotometric method for simultaneous determination of nickel and copper using 6-(2- naphthyl)-2,3-dihydro-1,2,4-triazine-3-thione (NDTT) as a selective analytical reagent was developed. The complexes of metal ions with NDTT were formed immediately in basic media and extracted with chloroform. The zero-crossing measurement technique was found suitable for the direct measurement of the third-derivative value of Ni-NDTT and Cu-NDTT at 501 and 472 nm respectively. Beer’s law is obeyed in the concentration range 1-30 μg/mL for both cations with different ratios. The limit of detection was 0.26 μg/mL and 0.13 μg/mL for copper and nickel respectively. The within day and between day variations showed coefficient of variation (CV%) values less than 2.80 and 2.97 for copper and nickel respectively. The error of the determination method did not exceed 6.50%. Analysis of alloy sample showed that this method can be successfully used for simultaneous determination of Cu and Ni in real samples.

scholarly journals Sensitive Spectrophotometric Determinations of Paracetamol and Protriptyline HCl Using 3-Chloro-7-hydroxy-4-methyl-2H-chromen-2-one

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Kumble Divya ◽  
Badiadka Narayana ◽  
Majal Sapnakumari
Keyword(s):  
Charge Transfer ◽  
Spectrophotometric Method ◽  
Charge Transfer Complex ◽  
Limit Of Detection ◽  
Pharmaceutical Formulations ◽  
Molar Absorptivity ◽  
Pharmaceutical Samples ◽  
Chromogenic Reagent ◽  
Detection And Quantification

A new spectrophotometric method is developed for the determination of Paracetamol (PCT) and protriptyline HCl (PTP) in pure forms and in pharmaceutical formulations. The experiment involves the use of 3-chloro-7-hydroxy-4-methyl-2H-chromen-2-one as a novel chromogenic reagent for the determination of PCT and PTP. The method is based on the formation of charge transfer complex between the drugs and chromogenic reagent. Beer's law is obeyed in the concentration ranges 10.00–60.00 µg mL−1 for PCT at 545 nm and 40.00–160.00 µg mL−1 for PTP at 468 nm. The molar absorptivity, Sandell, sensitivity, and limit of detection and quantification are also calculated. The method has been successfully applied for the determination of both PCT and PTP in pharmaceutical samples with acceptable results.

Sign in / Sign up

Export Citation Format

Share Document