Rapid Determination of Residue of Aluminum in Jellyfish Products by Inductively Coupled Plasma Mass Spectrometry with Ultrasonic Extraction

A method for the rapid determination of residue of aluminum in jellyfish products by inductively coupled plasma mass spectrometry with ultrasonic extraction was proposed. About 0.5 g of the crushed sample was taken, and 50.0 mL of 1.0% (volume fraction) nitric acid solution was added. The mixture was swirled for 1 min, and treated by ultrasonic at 25 ℃ for 10 min with ultrasonic power of 400 W. After centrifugation for 5 min, the supernatant was taken to determine. As shown by the results, using ⁴⁵Sc as the internal standard, linear relationship between mass concentration of ²⁷Al and response intensity ratio was found in the range of 0.1-10.0 mg·L^-1, with detection limit of 0.1 mg·kg^-1. RSD (n=6) of determined values of aluminum in jellyfish sample was 2.9%, and the recoveries of aluminum in the range of 95.3%-99.9% at 5 spiked concentration levels. Compared with the standard methods, there were no significant difference (P>0.05) between the determined values of aluminum in various jellyfish products.