Journal
ANALYTICA CHIMICA ACTA
Volume 909, Issue -, Pages 24-29Publisher
ELSEVIER
DOI: 10.1016/j.aca.2015.12.046
Keywords
Standard dilution analysis; Microwave-induced plasma; Matrix-matching; Calibration; Matrix effects; Beverages
Categories
Funding
- Agilent Technologies
- Wake Forest University
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES, Brazil) [99999.002566/2014-01]
Ask authors/readers for more resources
In this work, standard dilution analysis (SDA) is combined with microwave-induced plasma optical emission spectrometry (MIP OES) to determine seven elements in coffee, green tea, energy drink, beer, whiskey and cachaca (Brazilian hard liquor). No sample preparation other than simple dilution in HNO3 1% v v(-1) is required. Due to relatively low plasma temperatures, matrix effects may compromise accuracies in MIP OES analyzes of complex samples. The method of standard additions (SA) offers enhanced accuracies, but is time-consuming and labor intensive. SDA offers a simpler, faster approach, with improved accuracies for complex matrices. In this work, SDA's efficiency is evaluated by spike experiments, and the results are compared to the traditional methods of external calibration (EC), internal standard (IS), and standard additions (SA). SDA is comparable to the traditional calibration methods, and it provides superior accuracies for applications involving ethanol-containing beverage samples. The SDA-MIP OES procedure is effective. Using only two calibration solutions, it may be easily automated for accurate and high sample throughput routine applications. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available