Study on the determination of 18 elements in chocolate by inductively coupled plasma mass spectrometry
More Information
-
-
- Received Date:
August 22, 2012
-
-
Abstract
Samples of chocolate were digested by microwave digestion, and trace elements amounts of Na, Mg, P, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Mo and Pb in sample solutions were determined by inductively coupled plasma mass spectrometry (ICP-MS) . HNO3 +H2O2 were used to achieve the complete decomposition of the organic matrix in a closed - vessel microwave oven . Working parameters of the instrument were optimized. Results showed that the relative standard deviation (RSD) was less than 4.6% for all the elements, and the recovery was 89.60% 106.12% by adding standard recovery experiment. This method was simple, sensitive, precise and could perform simultaneous multi -elements determination of chocolate, which could satisfy the sample examination request and provide scientific rationale for determining inorganic elements of chocolate.
-
-
References
| [1] |
GB/T 19343-2003. 巧克力及巧克力制品[S]. 北京:中国标 准出版社, 2003.
|
| [2] |
刘平年. 高效液相色谱法测定巧克力中的可可碱和咖啡因 [J]. 分析化学计量, 2005, 14 (2) :30-31.
|
| [3] |
王红, 巢强国, 葛宇, 等. 巧克力食品中可可脂及其代用品的鉴别研究[J]. 食品科学, 2009, 30 (9) :66-69.
|
| [4] |
Karadjova I, Girousi S, Iliadou E, et al. Determination of Cd, Co, Cr, Cu, Fe, Ni and Pb in Milk, Cheese and Chocolate [J]. Microchim Acta, 2000, 134 (3-4) :185-191.
|
| [5] |
Da Silva E G P, Santos A C D, Costa A C S, et al. Determination of manganese and zinc in powdered chocolate samples by slurry sampling using sequential multi-element flame atomic absorption spectrometry[J]. Microchem J, 2006, 82 (2) : 159-162.
|
| [6] |
Dos Santos W N, Da Silva E G, Fernandes M S, et al. Determination of copper in powdered chocolate samples by slurry-sampling flame atomic-absorption spectrometry[J]. Anal Bioanal Chem, 2005, 382 (4) :1099-1102.
|
| [7] |
Pedro N A R, de Oliveira E, Cadore S. Study of the mineral content of chocolate flavoured beverages[J]. Food Chem, 2006, 95 (1) :94-100.
|
| [8] |
Mesko M F, Mello P A, Bizzi C A, et al. Iodine determination in food by inductively coupled plasma mass spectrometry after digestion by microwave -induced combustion [J]. Anal Bioanal Chem, 2010, 398 (2) :1125-1131.
|
| [9] |
Herwig N, Stephan K, Panne U, et al. Multi-element screening in milk and feed by SF-ICP-MS[J]. Food Chem, 2011, 124 (3) : 1223-1230.
|
| [10] |
陈少东, 陈福北, 陈剑平, 等. ICP-MS/ICP-AES法测定中 药益智仁中的元素含量[J]. 食品工业科技, 2011, 32 (5) :395-399.
|
| [11] |
陆秉源, 陆文伟, 朱玮琳, 等. 等离子体质谱-氧气碰撞池 技术测定复杂基体样品中痕量砷和硒[J]. 分析化学, 2009, 37 (12) :1781-1785.
|
| [12] |
Xie H L, Li Y J, Nie X D, et al. Matrix effects and behaviors of elements in oxalic acid medium by inductively coupled plasma mass spectrometry[J]. Chinese Chem Lett, 2006, 17 (7) : 945-948.
|
-
DownLoad: