Determination and Evaluation of Aluminum Contents in Flour Products

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.Various breads, pastries, fried bread stick, shrimp cracker, buns and other food samples were collected to detect the content of aluminum according to the method of CAS S-spectrophotometry from national standard GB 5009.182-2003, and health evaluation of flour products was carried out in accordance with GB2762-2005 "Standards of limit pollutants in food " (Al ≤ 100 mg/kg). 285 samples were qualified from 330 flour products, and the total qualified rate was 86.36%, and the content of aluminum content ranged from﹤0.5mg/kg to 255.1mg/kg. The content of aluminum of some samples like home-made steamed bread, stuffed buns, fried bread stick from canteens, small shops and supermarkets was higher than 100 mg/kg, in the range of 3.6-255.1, 28.0-217.2,7.6-185.8 mg/kg, and the qualified rate was 46.2%、61.1% and 35.3% respectively; The quality of other packaged food such as crackers, potato chips and so on was good.

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1022-1027

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November 2011

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[69] 61. 61 Packaged 218 216 99. 08 Total 330 285 86. 36 Table Ⅰ The experimental results of determination method precision(n=6) Samples Value(mg/kg) Average value(mg/kg) S RSD(%) Steamed bread 134. 3 142. 2 134. 2 135. 4 134. 9 135. 9 136. 2 3. 034 2. 220 Stuffed buns 213. 5 214. 3 216. 9 217. 2 215. 0 215. 2 215. 4 1. 449 0. 670 Crackers 10. 2 9. 8 9. 2 9. 6 10. 3 9. 6 9. 8 0. 412 4. 200 Table Ⅱ The test results and evaluation of aluminum levels of different flour products Sample name Number of samples Average value (mg/kg) Range (mg/kg) Number of qualified Al level ranges of Unqualified samples(mg/kg) Pass rate(%) Fried bread sticks.

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[34] 149. 0 3. 6-255. 1.

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[12] 137. 6-255. 1 35. 29 Stuffed buns.

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[18] 109. 2 28. 0-217. 2.

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[11] 110. 4-217. 2 61. 11 Bread.

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[52] 9. 4 ﹤0. 5-32. 2.

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[52] 100 Steamed bread.

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[26] 115. 2 7. 6-185. 8.

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[12] 125. 6-185. 8 46. 15 Cakes.

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[10] 10. 2 ﹤0. 5-26. 5.

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[10] 100 Potato chips.

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[24] 10. 1 ﹤0. 5-31. 5.

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[24] 100 Shrimp crackers.

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[36] 28. 5 ﹤0. 5-135. 3.

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[34] 129. 6-135. 3 94. 44 Crackers.

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[82] 16. 5 ﹤0. 5-40. 1.

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[82] 100 Manual twist.

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[8] 16. 2 ﹤0. 5-24. 2.

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[8] 100 Other snacks.

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[40] 30. 5 ﹤0. 5-68. 9.

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[40] 100 Total 330 285 86. 36 Tab le Ⅳ The results and evaluation of samples in different locations Sampling points Sample name Number of samples Number of qualified samles The highest detected value±SD (mg/kg) Pass rate(%) Canteens and bread houses Steamed bread.

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[18] [7] 185. 8±3. 5 38. 89 Fried bread sticks.

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[18] [7] 255. 1±2. 7 38. 89 Stuffed buns.

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[6] [6] 65. 4±1. 0 100 Cakes.

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[6] [6] 5. 5±0. 2 100 Bread.

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[24] [24] 29. 0±1. 3 100 Total.

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[72] [50] 69. 44 A certain supermarket Crackers.

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[16] [16] 37. 5±1. 6 100 Fried bread sticks.

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[4] [1] 213. 3±2. 9 25. 00 Stuffed buns.

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[4] [1] 161. 1±1. 8 25. 00 Steamed bread.

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[4] [1] 142. 2±0. 9 25. 00 Shrimp crackers.

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[4] [4] 27. 9±0. 8 100 Bread.

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[48] [39] 81. 25 Breakfast shop Stuffed buns.

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[8] [4] 217. 2±2. 1 50. 00 Steamed bread.

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[4] [4] 93. 1±1. 3 100 Fried bread sticks.

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[8] [0] 245. 5±1. 8.

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[20] [8] 40. 00 A certain sand supermarket Potato chips.

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[16] [16] 31. 5±0. 4 100 Shrimp crackers.

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[20] [20] 44. 3±1. 0 100 Bread.

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[12] [12] 18. 9±0. 8 100 Crackers.

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[42] [42] 35. 8±1. 1 100 Other snacks.

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[4] [4] 14. 3±0. 3 100 Total.

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[94] [94] 100 A certain department stores Potato chips.

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[4] [4] 22. 1±0. 7 100 Manual twist.

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[8] [8] 24. 2±0. 5 100 Crackers.

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[24] [24] 34. 8±1. 3 100 Bread.

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[8] [8] 25. 5±1. 1 100 Other snacks.

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[28] [28] 68. 9±2. 3 100 Shrimp crackers.

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[12] [10] 135. 3±2. 7 83. 33 Cakes.

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[4] [4] 26. 5±0. 6 100 Total.

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[88] [86] 97. 77 A certain base stores Hamburg.

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[4] [4] 18. 3±1. 0 100 Assured fried bread sticks.

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[4] [4] 21. 3±0. 9 100 Total.

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[8] [8] 100 Total 330 285 86. 36.

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