A packed column GC method was proposed for direct analysis of N-eon-taining low carbon compounds at ppm levels in wastewater, with Chromosorb 103 and 101 as the stationary phase.是什么意思_A packed column GC method was proposed for direct analysis of N-eon-taining low carbon compounds at ppm levels in wastewater, with Chromosorb 103 and 101 as the stationary phase.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句