Continuous flow autoanalyzer for the sequential determination of total sugars, colorant and caffeine contents in soft drinks

被引：24

作者：

Lucena, R ^{[1
]}

Cárdenas, S ^{[1
]}

Gallego, M ^{[1
]}

Valcárcel, M ^{[1
]}

机构：

[1] Univ Cordoba, Dept Analyt Chem, E-14071 Cordoba, Spain

来源：

ANALYTICA CHIMICA ACTA | 2005年 / 530卷 / 02期

关键词：

total sugars; caramel and caffeine; soft drinks; solid-phase extraction; multiparametric autoanalyzer;

D O I：

10.1016/j.aca.2004.09.028

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学]; 081704 [应用化学];

摘要：

A novel autoanalyzer for sequential determination of total sugars, class IV caramel and caffeine contents in soft drinks is described for the first time. The multiparametric autoanalyzer is based on the on-line coupling of a continuous solid-phase extraction unit with two detectors in series: UV-vis and evaporative light scattering (ELSD) detectors. Caffeine is selectively retained on the sorbent column and the other components are sequentially determined in the effluent. Caffeine was further eluted with an acetonitrile stream and the signal registered in the ELSD. The proposed autoanalyzer is a useful tool for the determination of these macrocomponents in the selected matrices on account of the high level of capital, basic and productivity-related analytical properties it provides. The method was validated through the use of spiked samples and applied to the analysis of more than 20 different soft drink samples (regular, diet, caffeine-free, energy drinks) with satisfactory results. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：283 / 289

页数：7

共 23 条

[1]

Carlson M, 1998, J AOAC INT, V81, P691

[2]

Determination of mono- and disaccharides by capillary electrophoresis with contactless conductivity detection [J].

Carvalho, AZ ;

da Silva, JAF ;

do Lago, CL .

ELECTROPHORESIS, 2003, 24 (12-13) :2138-2143

[3]

Determination and classification of added caramel color in adulterated acerola juice formulations [J].

Ciolino, LA .

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1998, 46 (05) :1746-1753

[4]

Flow injection Fourier transform infrared determination of caffeine in soft drinks [J].

Daghbouche, Y ;

Garrigues, S ;

Vidal, MT ;

delaGuardia, M .

ANALYTICAL CHEMISTRY, 1997, 69 (06) :1086-1091

[5]

De Camargo MCR, 1999, J SCI FOOD AGR, V79, P1861, DOI 10.1002/(SICI)1097-0010(199910)79:13&lt

[6]

1861::AID-JSFA448&gt

[7]

3.0.CO

[8]

2-Y

[9]

DREUX M, 1997, LC GC EUR, V10, P382

[10]

DETECTION AND IDENTIFICATION OF CARAMEL COLORS IN SOME LIQUID FOODSTUFFS [J].

DROSS, A ;

HARDT, R ;

BALTES, W .

FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1987, 328 (06) :495-498

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