Simultaneous determination of uranium and thorium using 4-(2′-thiazolylazo)resacetophenone oxime as analytical reagent. A derivative spectrophotometric method

1993 ◽  
Vol 170 (1) ◽  
pp. 181-187 ◽  
Author(s):  
A. Ramesh ◽  
J. Krishnamacharyulu ◽  
L. K. Ravindranath ◽  
S. Brahmaji Rao
Keyword(s):  
Simultaneous Determination ◽  
Spectrophotometric Method ◽  
Analytical Reagent

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.

Spectrophotometric method for the determination of demeclocycline using sodium molybdate as analytical reagent

1991 ◽  
Vol 103 (1-2) ◽  
pp. 65-70 ◽  
Author(s):  
Milena Jelikić-Stankov ◽  
Dejan Stankov ◽  
Dušan Malešev ◽  
Zorica Radović
Keyword(s):  
Spectrophotometric Method ◽  
Sodium Molybdate ◽  
Analytical Reagent

NOVEL UV SPECTROPHOTOMETRIC METHOD FOR ESTIMATION OF SITAGLIPTIN PHOSPHATE AND SIMVASTATIN BY AREA UNDER CURVE METHOD

INDIAN DRUGS ◽  
2013 ◽  
Vol 50 (04) ◽  
pp. 46-52
Author(s):  
V. V. Chopde ◽  
◽  
P. M. Patil ◽  
S. D Rathod ◽  
P. D. Chaudhari
Keyword(s):  
Simultaneous Determination ◽  
Wavelength Range ◽  
Spectrophotometric Method ◽  
Area Under Curve ◽  
Fixed Dose Combination ◽  
Fixed Dose ◽  
Economic Method ◽  
Curve Method ◽  
Dose Combination

A simple, versatile, accurate, precise and economic method for simultaneous determination of sitagliptin phosphate and simvastatin in fixed dose combination products was developed. The absorbance values at 267 nm and 239 nm for sitagliptin phosphate and simvastatin. The combination is also estimated by AUC method it involved measurement of area under curve in the wavelength range is 264-270 nm (λ1 -λ2 ) and 236-242 nm (λ3 -λ4 ) sitagliptin phosphate and simvastatin respectively. This method obeyed Beer’s law in the concentration range of 10-60 μg /mL for sitagliptin phosphate and 2-12 μg /mL for simvastatin. The results of analyses have been validated statistically for linearity, accuracy, precision, LOD and LOQ of the proposed method.

Sign in / Sign up

Export Citation Format

Share Document