Determination of Bromate, Iodate, Nitrite in Cosmetics and Foods by Ion Chromatography
- VernacularTitle:化妆品等健康相关产品中BrO_3~(-)、IO_3~(-)和NO_2~(-)的离子色谱测定法
- Author:
Daan DU
;
Zhixiong ZHONG
;
Jing YAO
- Publication Type:Journal Article
- Keywords:
Chromatography;
Cosmetics;
Iodate;
Bromate;
Nitrite
- From:
Journal of Environment and Health
1992;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish an IC method for determination of iodate, bromate, nitrite in cosmetics, food and salt by suppressed anion-exchange chromatography and ion-exchange with the addition of post column reagent. Methods A high capacity anion exchange column, Ion Pac9-HC column was used by 9 mmol/L sodium carbonate as eluent, and the flow rate was set up at 1.3 ml/min,an auto-suppression external water mode was used, 0.5 g/L o-dianisidine. 2HCl(ODA)+5 g/L KBr+20%methanel+5.6% nitric acid was used as post column reagent , the flow was set up 0.7 ml/min. The post column reaction (PCR) temperature was 60 ℃ and the visible absorbance detection at 450 nm. Samples were pretreated and analysed. Results The influence of pH of samples and coexist anion on determination was discussed. The detection limit(MDL) of the present method was 0.008-0.10 mg/kg, the recovery rates of the method were 92.0%-109.0% and the relative standard deviation (RSD) were 0.1%-7.2%. Conclusion This method is accurate, sensitive and suitable for trace analysis (?g/kg) of cosmetics and foods samples.
