摘要
用胶束电动毛细管色谱法同时测定了大气污染物甲醛、乙醛和丙酮。样品经２，４－二硝基苯肼衍生。采用４７ｃｍ（到检测窗口４０ｃｍ）×５０μｍｉ．ｄ．毛细管柱，以５０ｍｍｏｌ／Ｌ十二烷基硫酸钠－２０ｍｍｏｌ／Ｌ四硼酸钠溶液（ｐＨ９．００）为操作缓冲溶液，电压３０ｋＶ，检测波长２１４ｎｍ，７．５ｍｉｎ内甲醛、乙醛和丙酮的２，４－二硝基苯腙衍生物可获得良好的分离。用峰面积定量，线性范围为０．０１～０．５ｇ／Ｌ，最小检出浓度均为２ｍｇ／Ｌ，变异系数在８．７％以内。
A micellar electrokinetic capillary chromatographic method was developed for quantitative determination of environmental pollutants, formaldehyde, acetaldehyde and acetone in the atmosphere. The samples were derivatized to 2,4 dinitrophenylhydrazones. A fused silica capillary of 47cm×50μm i.d. (40cm to detector) was used. Running buffer was 20mmol/L aqueous tetraborate solution containing 50mmol/L sodium dodecyl sulfate (pH 900). The voltage used was 30kV. Detection wavelength was 214nm. The 2,4 dinitrophenylhydrazones were separated well within 75min. Peak area was used for quantitative analysis. The calibration curves were linear over 001 05g/L. The minimum detectable concentrations were 2mg/L. The variations were within 87%. The detection sensitivity of this method can be further improved through utilizing a filter of 350nm and a larger detection window. This method can also be applied to the determination of formaldehyde, acetaldehyde and acetone in other environmental samples.
出处
《色谱》
CAS
CSCD
北大核心
1998年第3期247-249,共3页
Chinese Journal of Chromatography
关键词
甲醛
乙醛
丙酮
大气污染物
测定
分析
MECC
micellar electrokinetic capillary chromatography, formaldehyde, acetaldehyde, acetone, quantitative analysis
