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Simultaneous Determination of Iodide, Sulphate, Fluoride and Nitrite in Salt Samples by Ion Chromatography
Corresponding Author(s) : Xia Ning
Asian Journal of Chemistry,
Vol. 26 No. 22 (2014): Vol 26 Issue 22
Abstract
Simultaneous determination of iodide, sulphate, fluoride and nitrite in salt samples by ion chromatography was demonstrated in this paper. To avoid the interference of Cl–, solid Ag2O was used as a precipitator. After that, ascorbic acid was added to reduce the iodate to iodide ion. In the analysis process, IonPac·RAS19 4 × 250 mm was selected with IonPacAG19 4 × 50 mm as guard column. Leachate of potassium oxide solution was used with 1 mL/min flow velocity. Linearity ranges of iodide, sulphate, fluoride and nitrite were 0.1-10, 0.05-1, 0.01-0.80 and 0.01-0.80 μg/mL, respectively and high correlations (R2) were all above 0.999. Limits of detection (LOD) were 10 mg/kg (iodide ion), 5 mg/kg (sulphate), 1 mg/kg (fluoride) and 1 mg/kg (nitrite). This method is simple and convenient with rapid, accurate and high sensitivity which could be accepted in daily analysis.
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- Y. Zhao and X.-Y. Lin, Chin. J. Publ. Health, 22, 492 (2006).
- People's Republic of China National Standard, Hygienic Standard for Food Grade Salt, (GB 2721-2003).
- P. Razpotnik, J. Turšič, M. Veber and M. Novič, J. Chromatogr. A, 991, 23 (2003); doi:10.1016/S0021-9673(03)00216-4.
- L. Barron and B. Paull, Anal. Chim. Acta, 522, 153 (2004); doi:10.1016/j.aca.2004.06.052.
- G.-R. Mo, Chin. J. Nat. Med., 4, 149 (2007).
- H.-Q. Huang, Food Sci., 23, 122 (2002).
- H.-T. Fu, Chinese J. Anal. Chem., 31, 376 (2003).
- L. Zhu, Chinese J. Health Lab. Technol., 15, 1334 (2005).
- S.-M. Mo and L.-N. Liang, Fenxi Ceshi Xuebao, 25, 105 (2006).
- People’s Republic of China National Standard, Physical Part of Food Hygiene Inspection (GB/T5009.42-2003).
- People’s Republic of China National Standard, Physical Part of Food Hygiene Inspection (GB/T5009.33-2010).
- R.D. Rocklin and E.L. Johnson, Anal. Chem., 55, 4 (1983); doi:10.1021/ac00252a005.
- Y.-L. Yang and L. Lin, Chinese J. Anal. Chem., 38, 1381 (2010).
- H.-T. Fu, L.-M. Fu and Y.-L. Zhang, Chinese J. Anal. Chem., 27, 684 (1999).
References
Y. Zhao and X.-Y. Lin, Chin. J. Publ. Health, 22, 492 (2006).
People's Republic of China National Standard, Hygienic Standard for Food Grade Salt, (GB 2721-2003).
P. Razpotnik, J. Turšič, M. Veber and M. Novič, J. Chromatogr. A, 991, 23 (2003); doi:10.1016/S0021-9673(03)00216-4.
L. Barron and B. Paull, Anal. Chim. Acta, 522, 153 (2004); doi:10.1016/j.aca.2004.06.052.
G.-R. Mo, Chin. J. Nat. Med., 4, 149 (2007).
H.-Q. Huang, Food Sci., 23, 122 (2002).
H.-T. Fu, Chinese J. Anal. Chem., 31, 376 (2003).
L. Zhu, Chinese J. Health Lab. Technol., 15, 1334 (2005).
S.-M. Mo and L.-N. Liang, Fenxi Ceshi Xuebao, 25, 105 (2006).
People’s Republic of China National Standard, Physical Part of Food Hygiene Inspection (GB/T5009.42-2003).
People’s Republic of China National Standard, Physical Part of Food Hygiene Inspection (GB/T5009.33-2010).
R.D. Rocklin and E.L. Johnson, Anal. Chem., 55, 4 (1983); doi:10.1021/ac00252a005.
Y.-L. Yang and L. Lin, Chinese J. Anal. Chem., 38, 1381 (2010).
H.-T. Fu, L.-M. Fu and Y.-L. Zhang, Chinese J. Anal. Chem., 27, 684 (1999).