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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This paper reports a pulse stripping voltammetry for determining trace amount of silver at non-mercury carbon fiber electrodes.

本文报道了一种使用无汞膜碳纤维微电极测定痕量银的脉冲溶出伏安法。

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This special action of the trace amount of the promoter in alkylation is defined as promotion effect, which has been confirmed repeatedly in our laboratory.

我们把微量反应助剂在固体酸催化烷基化反应中的这种特殊作用称为对烷基化反应的促进效应，这种促进效应已经在我们实验室中被反复证实。

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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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