Development of pretreatment method for simultaneous analysis of heavy metals in soft drinks
2020
Totsuka, M. | Umemura, Y. | Aoyama, F. | Watanabe, M. | Koike, Y. | Tanahashi, T.
For the purpose of increasing the recovery of Sn from soft drinks, we used the heat block for heating samples. The result showed that our method can obtain a better recovery of Sn by ICP-MS, using HNO3 to make the sample acidic instead of HCl, with the temperature of the sample finely controlled. Additionally, we evaluated their performance per governmental guidelines. Therefore, we obtained acceptable results about measurement trueness (97.1-104.5%), repeatability (0.6-1.5%), intermediate precision (0.7-1.8%) in the three metals. In conclusion, this method of not using HCl is useful to contribute further to the safety and security of food because of its ability to obtain accurate and speedy analyses.
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