Nanosilver detection and digestion method in complex matrix, such as in juice and milk

摘要

This paper investigated the nanosilver detection method by ICP-MS and digestion method in complex matrix, such as in apple juice, grape juice and milk. The results showed that the silver calibration curves have excellent related coefficient with the range of 0.999906 to 0.999972, and the method detection limit of ICP-MS for silver was 1.1653ppb. The sample digestion method for apple juice, grape juice and milk were optimized at different temperature and contact time, in which the optimal digestion method for apple juice and grape juice was at temperature of 95 °C and contact time of 25min, but that for milk should be enhanced the temperature to 155 °C.