|
1
|
Vakh C, Freze E, Pochivalov A, Evdokimova E, Kamencev M, Moskvin L, Bulatov A. Simultaneous determination of iron (II) and ascorbic acid in pharmaceuticas based on flow sandwich technique. J Pharmacol Toxicol Methods 2015; 73:56-62. [PMID: 25862995 DOI: 10.1016/j.vascn.2015.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/07/2015] [Accepted: 03/31/2015] [Indexed: 12/01/2022]
Abstract
The simple and easy performed flow system based on sandwich technique has been developed for the simultaneous separate determination of iron (II) and ascorbic acid in pharmaceuticals. The implementation of sandwich technique assumed the injection of sample solution between two selective reagents and allowed the carrying out in reaction coil two chemical reactions simultaneously: iron (II) with 1,10-phenanthroline and ascorbic acid with sodium 2,6-dichlorophenolindophenol. For achieving of excellent repeatability and considerable reagent saving the various parameters such as flow rate, sample and reagent volumes, reaction coil length were also optimized. The limits of detection (LODs) obtained by using the developed flow sandwich-type approach were 0.2 mg L(-1) for iron (II) and 0.7 mg L(-1) for ascorbic acid. The suggested approach was validated according to the following parameters: linearity and sensitivity, precision, recoveries and accuracy. The sampling frequency was 41 h(-1).
Collapse
Affiliation(s)
- Christina Vakh
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia.
| | - Elena Freze
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia
| | - Alexsey Pochivalov
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia
| | - Ekaterina Evdokimova
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia
| | - Mihail Kamencev
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia
| | - Leonid Moskvin
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia
| | - Andrey Bulatov
- Department of Analytical Chemistry, Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, pr. Universitetskij 26, 198504, Russia
| |
Collapse
|
|
2
|
Fulmes CS, Bulatov AV, Yasakova OG, Freze EA, Moskvin AN, Dedkov YM, Moskvin LN. Multicommutated Stepwise Injection Analysis as new approach for simultaneous determination of nickel (II), copper (II) and zinc (II) in wet aerosols. Microchem J 2013. [DOI: 10.1016/j.microc.2013.06.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
|
3
|
Davies AE, Fogg AG. Flow injection sandwich technique applied to indirect visible spectrophotometric determinations. bromimetric and iodimetric determination of sulphite. Anal Chim Acta 1995. [DOI: 10.1016/0003-2670(95)00395-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|