Automatic determination of ascorbic acid by flame atomic absorption spectrometry

被引：48

作者：

Yebra, MC ^{[1
]}

Cespón, RM ^{[1
]}

Moreno-Cid, A ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Fac Chem, Dept Analyt Chem Nutr & Bromatol, Santiago De Compostela 15782, Spain

来源：

ANALYTICA CHIMICA ACTA | 2001年 / 448卷 / 1-2期

关键词：

flame atomic absorption spectrometry; flow injection; poly(aminophosphonic acid) chelating resins ascorbic acid; chromium;

D O I：

10.1016/S0003-2670(01)01327-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A continuous flow procedure is proposed for the indirect determination of ascorbic acid based on its reducing properties. Chromium(VI) in acid medium was injected into a ascorbic acid stream, and the Cr(VI) was reduced to Cr(III). This Cr(III) formed was retained on-line, proportionally to the ascorbic acid concentration in the sample, on a poly(aminophosphonic acid) chelating resin, which is only selective for this oxidation state, while non-reduced Cr(VI) was determined by flame atomic absorption spectrometry. The proposed method allows the determination of ascorbic acid in the range 0.4-20 mug ml(-1) with a relative standard deviation of 2.0% at a rate of ca. 90 samples per hour. This method has been applied to the determination of ascorbic acid in pharmaceutical preparations and fruit juices. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：157 / 164

页数：8

共 29 条

[1] Differential electrolytic potentiometry, a detector in flow injection analysis for oxidation-reduction reactions [J].

Abulkibash, AMS ;

Koken, ME ;

Khaled, LM ;

Sultan, SM .

TALANTA, 2000, 52 (06) :1139-1142

[2] Nickel (II) tetraaza macrocycle modified electrodes for the electrocatalytic determination of L-ascorbic acid by the flow injection method [J].

Bae, ZU ;

Park, JH ;

Lee, SH ;

Chang, HY .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 468 (01) :85-90

[3] Determination of sulfur dioxide and ascorbic acid in beverages using a dual channel flow injection electrochemical detection system [J].

Cardwell, TJ ;

Christophersen, MJ .

ANALYTICA CHIMICA ACTA, 2000, 416 (01) :105-110

[4] Preconcentration and speciation of chromium by the determination of total chromium and chromium(III) in natural waters by flame atomic absorption spectrometry with a chelating ion-exchange flow injection system [J].

CesponRomero, RM ;

YebraBiurrun, MC ;

BermejoBarrera, MP .

ANALYTICA CHIMICA ACTA, 1996, 327 (01) :37-45

[5]

Danet AF, 2000, LUMINESCENCE, V15, P305, DOI 10.1002/1522-7243(200009/10)15:5<305::AID-BIO599>3.0.CO

[6]

2-X

[7] Flow injection kinetic spectrophotometric determination of ascorbic acid based on an inhibiting effect [J].

Fan, J ;

Ye, CL ;

Feng, SL ;

Zhang, G ;

Wang, JJ .

TALANTA, 1999, 50 (04) :893-898

[8] Potentiometric determination of L-ascorbic acid in pharmaceutical samples by FIA using a modified-tubular electrode [J].

Fernandes, JCB ;

Rover, L ;

Kubota, LT ;

Neto, GD .

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY, 2000, 11 (02) :182-186

[9] Flow electrochemical determination of ascorbic acid in real samples using a glassy carbon electrode modified with a cellulose acetate film bearing 2,6-dichlorophenolindophenol [J].

Florou, AB ;

Prodromidis, MI ;

Karayannis, MI ;

Tzouwara-Karayanni, SM .

ANALYTICA CHIMICA ACTA, 2000, 409 (1-2) :113-121

[10] Flow injection spectrophotometric or conductometric determination of ascorbic acid in a vitamin C tablet using permanganate or ammonia [J].

Grudpan, K ;

Kamfoo, K ;

Jakmunee, J .

TALANTA, 1999, 49 (05) :1023-1026

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