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food packing box
相关语句
  食品包装盒
     A method of determination of micro amounts of tin in food packing box is established based on the above mentioned color reaction, and the results obtained are satisfactory.
     方法的灵敏度、选择性和稳定性均比无柠檬酸存在时好 ,可用于食品包装盒中微量锡的测定。
短句来源
  相似匹配句对
     Active packing of food
     食品活性包装
短句来源
     Visual Culture in Food Packing
     透视食品包装中的视觉文化
短句来源
     Food
     心路历程——食物
短句来源
     ORGANIC FOOD
     有机食品,你吃过了吗?
短句来源
     Packing Seal
     填料密封
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In a chloroacetic acid buffer solution of pH 1.8, and in the presence of CTMAB, tin(Ⅳ) reacts with citric acid and BPR forming an orange-red colored micellar mixed ligand complex having its mole ratio of Sn(Ⅳ)∶Cit∶BPR=1∶1∶2. The absorption maxima of this complex lies at the wavelength of 534nm, with its molar absorptivity of 1.72×10 5L·mol -1·cm -1. Beer′s law is obeyed in the range of 0 to 0.24mg of Sn(Ⅳ) per liter of solution. This ternary complexing system behaves with higher sensitivity, selectivity...

In a chloroacetic acid buffer solution of pH 1.8, and in the presence of CTMAB, tin(Ⅳ) reacts with citric acid and BPR forming an orange-red colored micellar mixed ligand complex having its mole ratio of Sn(Ⅳ)∶Cit∶BPR=1∶1∶2. The absorption maxima of this complex lies at the wavelength of 534nm, with its molar absorptivity of 1.72×10 5L·mol -1·cm -1. Beer′s law is obeyed in the range of 0 to 0.24mg of Sn(Ⅳ) per liter of solution. This ternary complexing system behaves with higher sensitivity, selectivity and stability than the complexing system without citric acid. A method of determination of micro amounts of tin in food packing box is established based on the above mentioned color reaction, and the results obtained are satisfactory.

在 pH 1.8的氯乙酸缓冲溶液中和有溴化十六烷基三甲基铵存在下 ,锡 (Ⅳ )和柠檬酸及溴邻苯三酚红形成 1∶1∶2的橙红色胶束混配络合物。该络合物最大吸收波长为 5 34nm ,表观摩尔吸光系数为 1.72× 10 5L·mol- 1·cm- 1。锡 (Ⅳ )浓度在 0~ 0 .2 4mg·L- 1范围内符合比耳定律。方法的灵敏度、选择性和稳定性均比无柠檬酸存在时好 ,可用于食品包装盒中微量锡的测定。

 
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