Determination of Manganese in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry

Abstract:

A fast and effective method was developed for determination of Mn in leisure foods by incomplete digestion-microemulsion sampling-high resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GFAAS). Microemulsions were prepared with digestive liquor and n-butyl alcohol as an auxiliary emulsifier after incomplete digestion treatment. The factors influencing determination were investigated by single factor experimental design. The optimal determination conditions were found as follows: the tartaric acid (1 mg/mL) was added as a chemical modifier with the volume of 4 μL; pyrolysis temperature 1100°C; atomization temperature 2000°C. The results showed that the correlation coefficient was better than 0.996, the characteristic concentration was 0.09 μg/L, the precision (RSD) for 6 replicate measurements of Mn was 2.8% and the average of recoveries was 97.3%. F-test and t-test (95% confidence level) in between the proposed method and the microwave digestion-HR-CS GFAAS method had no significant difference. Therefore, the proposed method was accurate and stable with a high practical value. It provided scientific basis for determination of metal elements in food.

• Periodical: Advanced Materials Research (Volumes 1033-1034)
• Pages: 643-647
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.643
• Online since: October 2014
• Authors: Jing Zhi Miao*, Shang Long Chen, Chao Li, Yong Hua Wu
• Keywords: Hr-Cs GFAAS, Incomplete Digestion, Leisure Foods, Microemulsion, Mn

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