期刊
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
卷 41, 期 -, 页码 45-53出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2015.02.002
关键词
Flow-batch analysis; Sequential injection; Monosegmented flow analysis; Spectrophotometry; Aluminium; Eriochrome cyanine R; Water; Beverage; Food analysis; Food composition; Food safety; Heavy metals in food chain; Food safety and Heavy metals in food chain
资金
- Faculty of Science, Mahasarakham University [MSU-SC-2557/006/57]
- Mahasarakham University Development Fund
- Office of the Higher Education Commission
- Ministry of Education
- Thailand Research Fund (TRF)
- Royal Golden jubilee Ph.D. Program
- Center of Excellence on Innovation in Analytical Science and Technology (I-ANALY-ST), Chiang Mai University
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
A sensitive, precise and reliable flow-batch method for the determination of aluminium (Al) was developed using a sequential injection-monosegmented flow system incorporating a mixing chamber unit. Eriochrome cyanine R (ECR) was used as a chromogenic reagent in the presence of N,N-dodecyltrimethylammonium bromide (DTAB). The Al-ECR complex at pH 6 gave a maximum absorption at 584 nm. In-line single standard calibration and a standard addition procedure were developed employing the monosegmented flow technique. Under the optimum conditions, a linear calibration graph in the range of 0.0075-0.625 mg L-1 Al was obtained with limits of detection and quantitation of 0.0020 and 0.0070 mg L-1, respectively. Relative standard deviations were 0.8 and 1.3% for 0.010 and 0.025 mg L-1 Al (n = 11), respectively. A sample throughput of 24 h(-1) using an in-line standard calibration approach and 6 h-1 using four standard addition levels was achieved. The developed system was successfully applied to water samples and beverage samples. The results agreed well with those obtained from the ICP-AES method. Good recoveries between 85 and 104% were obtained. (C) 2015 Elsevier Inc. All rights reserved.
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