Measurement and Results - Measuring chloride in milk using ICP-MS
I was looking online for method for measuring chloride in milk using ICP-MS, and wondered if you had any suggestions?
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admin
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Chloride has several very serious interferences by ICP-MS making its determination difficult at best. The 35-Cl mass is interfered with by 16O18O1H and 34S1H; and the 37-Cl mass is interfered with by 36Ar1H, and 36S1H. I have not been able to find any applications using ICP-MS for the determination of chloride. The method that is suggested for this application is AOAC Method 986.26 where the milk is dispersed with water and acidified and the soluble chlorides titrated potentiometrically with AgNO3. There are other methods such as XRF, combustion/microcoulometric detection, and ion chromatography (IC). Some applications have also been reported using ICP-OES but the instrument must be capable of going down to ~ 130 nm. At Inorganic Ventures, we use Ion Chromatography and ICP-OES for chloride measurements.
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