[Determination of 8 elements in food by inductively coupled plasma optical emission spectrometer simultaneously].

OBJECTIVE

To establish a method for determination of 8 elements including K, Na, Ca, Mg, Fe, Zn, Cu and Mn in food by inductively coupled plasma optical emission spectrometer (ICP-OES).

METHODS

After high-pressure digestion by HNO3 in closed-vessel, 8 elements were simultaneously determined by ICP-OES.

RESULTS

The detection limits of 8 elements ranged from 0. 02 to 6 mg/kg(solid samples), 0. 005 mg/L to 2 mg/L(liquid samples). The average correlation coefficients were; ≥0. 999 with good linearity. The precision ranged from 0. 1% to 9. 6%, the recoveries ranged from 88% to 115%. The results of analyzing standard materials were in the certificate values.

CONCLUSION

The method is rapid and accurate with less interference which meets the technical requirements of food testing and can be applied to the determination of 8 elements in food simultaneously.