... trace amount 痕量 trace of impurities 微量杂质 traceable (1)可描绘的(2)可跟踪的 ...
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公告说：新闻报道中所说的钕和铬在被抽检SKII产品中只以 微量杂质 （ trace impurities ）的形式存在，以这些微量水平不会造成任何安全问题。
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关键词 : 磷石膏 ; 应用 ; 微量杂质 [gap=495]Keywords: Phosphogypsum; Application; Minor impurity
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微量杂质元素 Pb Cd Cr As ; trace impure elements
采用石墨炉原子吸收法，测定了铁矿石、球团矿和烧结矿中微量杂质砷。
It was reported that trace amounts of arsenic in iron ores, spherical ores and sintering ores were determined by GFAAS.
前言：采用石墨炉原子吸收法，测定了铁矿石、球团矿和烧结矿中微量杂质砷。
It was reported that trace amounts of arsenic in iron ores, spherical ores and sintering ores were determined by GFAAS.
还用原子吸收光谱法测定了产品中微量杂质的含量，对改进生产工艺具有指导作用。
The trace impurity in product has been determined by A A S. it is important to improve process.
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