摘要
大气颗粒物中以铬酸盐形式存在的六价铬一般采集于大气滤膜上,含量极低,常规检测方法无法准确检出。利用离子色谱检测灵敏度高的特点,建立了测定大气中痕量六价铬的离子色谱方法。最低检出限可达0.48,ng/m^3,相对标准偏差在1.1%-9.1%,,实际样品加标回收率在105%-118%,。方法准确可靠,可满足测定大气中六价铬的需要。
In atmospheric particulates, chromium（ Ⅵ）exists in the form of chromates and in atmospheric filter membranes, extremely low content of chromium （Ⅵ）can be collected. Therefore, conventional inspection methods cannot precisely detect it. This paper, taking advantage of highly sensitive ion chromatography, establishes a determination method of trace amount chromium （Ⅵ）in the atmosphere by ion chromatography. The minimum detection limit reaches 0.48 ng/m^3 with a relative standard deviation between 1.1% - 9.1% and an actual sample standard addition recovery between 105%- 118%. This method is accurate and reliable and can meet the needs of the determination of chromium （Ⅵ）in the atmosphere.
出处
《天津科技》
2015年第8期22-23,共2页
Tianjin Science & Technology
关键词
离子色谱
六价铬
大气检测
ion chromatography
chromiun （Ⅵ）
determination of atmosphere
