用安培检测-离子色谱法检测了乳品中的微量碘。以NaOH作淋洗液，直接进样，优化了碘的离子色谱分离和测定条件，方法的检测限达1μg/L(3倍信噪比)。测定了婴儿奶粉、孕产妇专用奶粉和鲜牛奶中的微量碘，加标回收率分别为89.0%，86.0%和84.1%。
A method was developed for the determination of micro amoun ts ofiodi de in dairy products by ion chromatography with direct amperometric detection.T he eluent used was 0.04 mol/L NaOH.The relative standard deviations of retenti on times and peak heights for 1 mg/L and 2 μg/L iodide solutions were 0.67%,3 .9%(n=8) and 0.97%,1.8%(n=8),respectively. Calibration curves showed good linearity with r=0.999 1(n=8,from 10 μg/L to 160μg/L),an d with r=0.998 6(n=8,from 400 μg/L to 5mg/L).The detection lim it of iodide by this method was 1 μg/L.The method has been used to analyse two kinds of milk powder and a kind of fresh milk. The recoveries were 89.0%,86.0% and 84.1% for infant formula milk powder, mother's milk powder and fresh milk , respectively.
参考文献
| [1] | MOU Shi-fen，LIU Kai-lu．Ion chromatography．Beijing：Science Pre ss,1986.245,180牟世芬,刘开录.离子色谱.北京:科学出版社,1986.245,180 |
| [2] | Curtis A R, Hamming P. J Assoc Off Anal Chem, 1982,65:20-25 |
| [3] | Fisher P W, Giroux A. Can Inst Food Sci Technol J, 1987,20:166-170 |
| [4] | Stabel-Taucher R. Finn Chem Lett,1976,1:27-32 |
| [5] | Baker H J. J Assoc Off Anal Chem, 1977, 60:1370-1376 |
| [6] | Stijve T, Diserens J M, Blake C H. Dtsch Lebensm-Rundsch, 1988, 84:341-347 |
| [7] | Dionex Corporation. Dionex applica tion note 37. California:Dionex Corporation Sunnyvale, 1995.1-5 |
| [8] | Chadha R K, Lawrence J F. J Chromatogr,1990,518:268-272 |
| [9] | Yang X R, Chen P, Wei W Z. Microchem J,1998,58(1):58-66 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%