trace quantity

常见例句

Headspace gas chromatography (HS-GC), which is an important method designed for the analysis of volatile components with trace quantity in samples, is developing fast.
顶空气相色谱法（ HS- GC）是测定样品中痕量易挥发化合物的重要分析方法，近年快速发展。
Though the toxic organic pollutants are trace quantity in aquatic system, they cause potential hazardous effects on human health because of their high degree of biocumulatiori and carcinogenic.
有毒有机污染物虽然在水中含量甚微，却因其生物累积性和三致效应而对人体健康构成潜在威胁。
The application of nitrous oxide-ethane flame atomic absorbing spectral method to measure the content of Chromium trace quantity in nickel-plating liquid of the cadmium nickel battery was studied.
运用一氧化二氮-乙炔火焰原子吸收光谱法进行镉镍电池镀镍溶液中铬含量的测定。