trace amount

基本解释

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。
This paper describes the atomic absorption method in which the pyrogallol is used as releasing agent to assay directly the trace amount of calcium in calcium tungstate in air-acetylene flame.
本文选用了焦（?）酚作释放剂，在空气—乙炔火焰中直接测定钨酸中的微量钙。
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。

Nuclear dye is just as it sounds: a trace amount of radioactive material is injected intravenously and circulates throughout the bloodstream.
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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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