Trace amount of chromium and nickel was determined using a flow injection on line extraction FAAS system.

本文用流动注射-在线萃取火焰原子吸收法测定了人发中微量的铬和镍。

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It is more difficult to treat trace amount of silver and mercury ions than those of large amount in liquid.

论文摘要在实际的水处理过程中，含有微量银、汞离子的废水处理往往比含大量银、汞离子的废水更加困难。

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The results show that it is a effective means to concentrate trace amount of volatile organic substance in GC analysis.

实验表明，该装置是痕量挥发性有机物浓缩富集-气相色谱分析的有效手段。

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The trace amount is not enough to cause illness, USDA officials said, and is of no special concern.

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Griesing's organization vigorously fought the move to phosphate-free until Washington State passed a law in March 2006 limiting the amount of phosphates in household dishwasher detergent sold in that state to 0.5%, or a trace amount, effective July 1, 2010 (in most of the state).

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"This is very exciting, clearly, because here we have somebody who can have anaphylaxis and deadly reaction from trace amounts, and you're converting this person into somebody who can tolerate a significant amount of the food, " said Dr. Anna Nowak-Wegrzyn, associate professor of pediatrics at Mount Sinai Medical Center in New York.

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