scholarly journals Application of Net Analyte Signal Standard Addition Method (NASSAM) for Simultaneous Determination of Lead and Tin by Differential Pulse Polarography

2011 ◽  
Vol 58 (3) ◽  
pp. 353-361 ◽  
Author(s):  
Karim Asadpour-Zeynali ◽  
Mir Reza Majidi ◽  
Javad Vallipour ◽  
Samira Jafari
Keyword(s):  
Simultaneous Determination ◽  
Standard Addition ◽  
Differential Pulse ◽  
Standard Addition Method ◽  
Differential Pulse Polarography ◽  
Addition Method ◽  
Net Analyte Signal ◽  
Analyte Signal ◽  
Pulse Polarography

scholarly journals Net analyte signal standard addition method for the simultaneous determination of cadmium and nickel

2009 ◽  
Vol 74 (7) ◽  
pp. 789-799 ◽  
Author(s):  
Karim Asadpour-Zeynali ◽  
Reza Majidi ◽  
Masoud Tahmasebpour
Keyword(s):  
Simultaneous Determination ◽  
Standard Addition ◽  
Differential Pulse ◽  
Single Step ◽  
Standard Addition Method ◽  
Differential Pulse Polarography ◽  
Addition Method ◽  
Net Analyte Signal ◽  
Analyte Signal

A novel net analyte signal standard addition method (NASSAM) is presented for the simultaneous determination of Cd2+ and Ni2+ in their mixture by differential pulse polarography. The method combines the advantages of the standard addition method with the net analyte signal concept, which enables the extraction of information concerning a certain analyte from voltammograms of multi-component mixtures. This method has some advantages, such as: the use of a full voltammogram, realization in a single step, therefore it does not require calibration and prediction steps and only a few measurements are required for the determination. The simultaneous determination of Cd2+ and Ni2+ was performed in Britton-Robinson buffer (pH 2.87) and 0.40 M potassium thiocyanate solution.

scholarly journals Simultaneous Determination of Antazoline and Naphazoline by the Net Analyte Signal Standard Addition Method and Spectrophotometric Technique

2010 ◽  
Vol 93 (6) ◽  
pp. 1995-2001 ◽  
Author(s):  
Karim Asadpour-Zeynali ◽  
Raoof Ghavami ◽  
Roghayeh Esfandiari ◽  
Payam Soheili-Azad
Keyword(s):  
Simultaneous Determination ◽  
Multivariate Calibration ◽  
Standard Addition ◽  
Single Step ◽  
Standard Addition Method ◽  
Addition Method ◽  
Net Analyte Signal ◽  
Analyte Signal ◽  
Calibration Methods

Abstract A novel net analyte signal standard addition method (NASSAM) was used for simultaneous determination of the drugs anthazoline and naphazoline. The NASSAM can be applied for determination of analytes in the presence of known interferents. The proposed method is used to eliminate the calibration and prediction steps of multivariate calibration methods; the determination is carried out in a single step for each analyte. The accuracy of the predictions against the H-point standard addition method is independent of the shape of the analyte and interferent spectra. The net analyte signal concept was also used to calculate multivariate analytical figures of merit, such as LOD, selectivity, and sensitivity. The method was successfully applied to the simultaneous determination of anthazoline and naphazoline in a commercial eye drop sample.

Generalized Net Analyte Signal Standard Addition as a Novel Method for Simultaneous Determination: Application in Spectrophotometric Determination of Some Pesticides

2014 ◽  
Vol 97 (1) ◽  
pp. 252-258 ◽  
Author(s):  
Karim Asadpour-Zeynali ◽  
Elhameh Saeb ◽  
Javad Vallipour ◽  
Mehdi Bamorowat
Keyword(s):  
Spectrophotometric Determination ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Addition Method ◽  
Net Analyte Signal ◽  
Analyte Signal ◽  
Novel Method ◽  
Single Standard ◽  
Generalized Net

Abstract Simultaneous spectrophotometric determination of three neonicotinoid insecticides (acetamiprid,imidacloprid, and thiamethoxam) by a novel methodnamed generalized net analyte signal standard addition method (GNASSAM) in some binary and ternarysynthetic mixtures was investigated. For this purpose, standard addition was performed using a single standard solution consisting of a mixture ofstandards of all analytes. Savings in time and amount of used materials are some of the advantages of this method. All determinations showed appropriate applicability of this method with less than 5% error. This method may be applied for linearlydependent data in the presence of known interferents. The GNASSAM combines the advantages of both the generalized standard addition method and net analyte signal; therefore, it may be a properalternative for some other multivariate methods.

scholarly journals The application of DP polarography for the determination of zinc and content of zinc pyrithione in anti-dandruff shampoos

2015 ◽  
Vol 13 (3) ◽  
pp. 181-190 ◽  
Author(s):  
Slavica Blagojevic ◽  
Ferenc Pastor ◽  
Ivan Boric ◽  
Natasa Eric ◽  
Desanka Suznjevic
Keyword(s):  
Active Ingredient ◽  
Standard Addition ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Zinc Pyrithione ◽  
Indirect Determination ◽  
Pulse Polarography ◽  
Rapid Control ◽  
Curve Method

Commercially formulated anti-dandruff shampoos contain zinc pyrithione (ZPT) as an active ingredient that has antifungal, antibacterial and anti-seborrheic properties. The determination of ZPT concentration in commercial anti-dandruff shampoos by differential pulse polarography (DPP) was based on the electrochemical reduction of zinc ions in ammoniacal buffer pH 10.2, and the linear dependence of the reduction differential pulse peak current at the potential -1.33 V vs. concentration of zinc. Using the calibration curve method, it was found that the range of linearity for the determination of zinc concentration was from 1.28 x 10?5 to 1.39 x 10-4 mol L-1 (linear regression equation: I = - 0.097 + 6.635 x 105c). Surface active ingredients and micro-components in the shampoos did not exert a polarographic interference for the determination of zinc and did not affect the indirect determination of the content of the active ingredient ZPT. The concentrations of zinc in the analyzed anti-dandruff shampoo samples were determined by the standard addition method, resulting in 4.20 x 10-2 mol L-1, 1.76 x 10-1 mol L-1 and 1.82 x 10-1 mol L-1. The results of DPP determinations of zinc and ZPT show that the content of ZPT was 0.28%, 1.15% i.e. 1.19% and was below the maximum recommended level of ZPT in anti-dandruff shampoos. This simple and sensitive differential pulse polarography method is suitable for a routine and rapid control of the active ingredient content, as well as for the quality control of anti-dandruff shampoos.

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