Abstract
A method for determining mercury content in the food paper-plastic composite packaging materials with wet digestion-atomic fluorescence spectrometry was developed. The sample of 0.500 0 g with 10 mL of concentrated nitric acid and 2 mL of hydrogen peroxide digestion 4 h could get the best results. The best optimized atomic fluorescence spectrometer detection conditions of mercury were as followed: a negative high voltage of 210 V, the shielding gas flow rate of 900 mL/min, the carrier gas flow rate of 500 mL/min, injection volume of 0.5 mL, the Hg lamp current of 10 mA, the atomizer height of 10 mm, reading time of 10s, the delay time of 1.0 s, carrier medium for the 5% hydrochloric acid, potassium borohydride solution and the concentration of the potassium hydroxide solution 5 g/L. Mercury showed a good linear relationship in the range of 0.0 to 20.0 ng/mL with a correlation coefficient of 0.999 6, and the detection limit was 0.002 5 μg/mL. The recoveries of mercury range from 95.93% to 97.38%, and the relative standard deviations of mercury ranged from 3.02% to 3.85%. The method has the advantages of high precision, low detection limit and high accuracy, and it is applicable to detection and analysis of mercury content in food paper-plastic composite packaging materials in the market.
Publication Date
10-28-2015
First Page
62
Last Page
65,106
DOI
10.13652/j.issn.1003-5788.2015.05.015
Recommended Citation
Xianglian, PENG and Hongjun, FU
(2015)
"Determination of mercury content in the food paper-plastic composite packaging materials,"
Food and Machinery: Vol. 31:
Iss.
5, Article 15.
DOI: 10.13652/j.issn.1003-5788.2015.05.015
Available at:
https://www.ifoodmm.cn/journal/vol31/iss5/15
References
[1] Syversen T, Kaur P. The toxicology of mercury and its compounds[J]. Journal of Trace Elements in Medicine an Biology, 2012, 26(4): 215～226.
[2] 常晓途，陈新焕，杨代明，等. 直接测汞仪测定大米中汞的不确定度评定[J]. 食品与机械，2010，26(3)：85～87．
[3] Lamberty A, van Borm W, Qu evauviller P, et al. The EU net work on trace element speciation in full swing[J]. Anal. Chem., 2001, 370: 811.
[4] Silva D G, Portugal L A, Serra A M, et al. Determination of mercury in rice by MSFIA and cold vapour atomic fluorescence spectrometry[J]. Food Chemistry, 2013, 137(1～4): 159～163.
[5] Liu Q Y. Direct determination of mercury in white vinegar by matrix assisted photochemical vapor generation atomic fluorescence spectrometry detection[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2010, 65(7): 587～590.
[6] 白彦真，谢英荷，张小红．氢化物发生原子荧光法测定陶瓷样品中汞[J]．安徽农学通报，2012，18（13）：184～185．
[7] 彭湘莲，刘宗敏，刘云．湘江长沙段水中铅、镉、铬含量对淡水鱼的影响[J]．食品与机械，2013，29（5）：68～70.
[8] 彭湘莲，李忠海，王利兵，等．湿法消解—火焰原子吸收法测定食品纸塑包装材料中铅镉含量[J]．中国食品学报，2013，13（7）：195～199.
[9] 原子荧光光度计分析方法手册[M]．北京：吉天仪器有限公司，2009：8．
[10] 庞洁，张立颖，陆建平，等．氢化物发生—双道原子荧光光谱法同时测定锰渣中砷和汞[J]．分析科学学报，2012，28（5）：724～726．
[11] 梁晶辉，马艳君．原子荧光光度法测定幼儿乳粉中的金属汞[J]．中国卫生工程学，2012，11（6）：508～509．