2 Ion Chromatography ICP-Q-MS for the Detection of Arsenic Species in Apple Juice Ion Chromatography ICP-Q-MS for the Detection of Arsenic Species in Apple Juice

The results for the arsenic speciation analysis and total arsenic analysis are in agreement. Other arsenic species being present in concentrations below the LOD might be responsible for the slight difference between the total As concentration and the sum of all species. The trace amounts of As found also correspond to the range of arsenic concentrations typically found in apple juices as published by the US FDA (between 2 and 6 ng/g).3 Conclusion • The combination of the Dionex ICS-5000 ion chromatography system with the XSERIES 2 ICP-Q-MS provides a highly sensitive, routine IC-ICP-MS technique for the determination of trace metal species. • A highly sensitive and specific method for the speciation analysis of arsenic in apple juice samples has been developed and applied to the analysis of different juices after a simple tenfold dilution. • The Dionex IonPac AS7 anion-exchange column used in this study was not only able to efficiently separate six different arsenics species, but also helped to improve the sensitivity of the technique by concentrating each eluted species into a narrow peak. The low flow rate of 0.3 mL/min helps to reduce both sample and mobile phase consumption