PPB助记

PPB

abbr.part per billion 10亿分之…;

英文例句/中文翻译：

1、

determination of zinc at ppb levels in high-purity gallium with flameless atomic absorption spectrometry

非火焰原子吸收光谱法测定超纯镓中ppb级锌

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2、

determination of ppb level anions in sulfolane by ion chromatography with a novel column-switching injection system;

综述了离子色谱技术在气溶胶可溶性无机离子测定中的应用。

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3、

Studies of the determination of rare earth elements at ppb. level with ICP spectrometry

ppb级稀土元素分量等离子光谱测定的研究

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