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ION CHROMATOGRAPHIC (IC) DETERMINATION OF BROMATE ION IN MINERAL WATER

Zhao Zhen-ping

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Abstract

IC was applied to the determination of bromate in mineral water. The interference of chloride ion was eliminated by the addition of an appropraite amount of AgNO_3 solution. DX-100 Ion-chromatograph was used for the analysis, using AS12A as separation column. A mixed solution composing of 1.7mmol·L~(-1) Na_2HCO_3 and 1.8mmol·L~(-1) Na_2CO_3 was used as eluant at a flow-rate of 1.0ml·min~(-1). Sampling volume of 25μl was used, and conductometric detection was used in the final determination. RSD′s (n=6) obtained was 1.0% and recoveries were in the range 95.5%～102.0%.

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What this paper is about

IC was applied to the determination of bromate in mineral water. The interference of chloride ion was eliminated by the addition of an appropraite amount of AgNO_3 solution. DX-100 Ion-chromatograph was used for the analysis, using AS12A as separation column. A mixed solution composing of 1.7mmol·L~(-1) Na_2HCO_3 and 1.8mmol·L~(-1) Na_2CO_3 was used as eluant at a flow-rate of 1.0ml·min~(-1). Sampling volume of 25μl was used, and conductometric detection was used in the final determination. RSD′s (n=6) obtained was 1.0% and recoveries were in the range 95.5%～102.0%.

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Available abstract

IC was applied to the determination of bromate in mineral water. The interference of chloride ion was eliminated by the addition of an appropraite amount of AgNO_3 solution. DX-100 Ion-chromatograph was used for the analysis, using AS12A as separation column. A mixed solution composing of 1.7mmol·L~(-1) Na_2HCO_3 and 1.8mmol·L~(-1) Na_2CO_3 was used as eluant at a flow-rate of 1.0ml·min~(-1). Sampling volume of 25μl was used, and conductometric detection was used in the final determination. RSD′s (n=6) obtained was 1.0% and recoveries were in the range 95.5%～102.0%.

Key concepts: Bromate, Chemistry, Conductometry, Chromatography, Elution, Ion chromatography, Volumetric flow rate, Ion

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