Simultaneous Spectrophotometric Determination of Bi(III) and Sb(III) Based on Their Complexes with Iodide in Acidic Media Using the H-Point Standard Addition Method and First-Derivative Spectrophotometry

Simultaneous spectrophotometric determination of Bi(III) and Sb(III) based on their complexes with iodide in acidic media using the H-point standard addition method and first-derivative spectrophotometry.

The H-point standard addition method (HPSAM) was applied to the simultaneous determination of Bi(III) and Sb(III). This method is based on the difference in the absorbance of complexes of Bi(III) and Sb(III) with iodide in acidic media in different wavelength pairs. The results showed that Bi(III) and Sb(III) can be determined simultaneously with concentration ratios of 15:1 to 1:20. First-deri...

simultaneous determination of lovastatin and niacin in tablet by first and third derivative spectrophotometry and h-point standard addition methods

most cardiovascular diseases need to be treated by more than a simple drug and the use of combination products diminishes noncompliance. advicor ® as a combination product of a vitamin and a fat lowering agent has no monograph in official pharmacopeias for its quality control purposes. in this study, first and third derivative signals for na and lv quantitation at the two pairs of wavelengths, ...

Simultaneous Spectrophotometric Determination of Vanadium(V) and Iron(III) in Micellar Medium by H-Point Standard Addition Method

H-Point Standard Addition Method (HPSAM) was applied for the simultaneous determination of V(V) and Fe(III). The method is based on the complex formation of V(V) and Fe(III) with chromazurol S (CAS) in acidic media and in the presence of cetyltrimethylammonium bromide (CTAB) as a micellizing agent. Acidic media and the presence of a micellar system improve selectivity and sensitivity. Fe (I...

simultaneous spectrophotometric determination of amlodipine and atorvastatin in commercial tablet by h-point standard addition method

Simultaneous determination of lovastatin and niacin in tablet by first and third derivative spectrophotometry and H-point standard addition methods

Most cardiovascular diseases need to be treated by more than a simple drug and the use of combination products diminishes noncompliance. Advicor(®) as a combination product of a vitamin and a fat lowering agent has no monograph in official pharmacopeias for its quality control purposes. In this study, first and third derivative signals for NA and LV quantitation at the two pairs of wavelengths,...