Abstract: Matrix effects of inductively coupled plasma mass spectrometry(ICP-MS) with the self-installed micro-sampling system at 22 μL/min of solution uptake rate were studied. In the presence of 2 g/L matrix elements with different masses or ionization potentials, the signal intensity of analyzed elements was measured. For light analyzed elements, the interferences were observed; while for high mass analyte elements, the normalized intensity was close to 1. In the presence of 5% organic matrix, the normalized intensity was near to 0 5. When common elements such as K, Na, Ca, Mg at 500 mg/L or 1% organic solvents such as ethanol and acetic acid existed in the solution, the signals of analyzed elements were almost not affected. The results show that the micro-sampling system has a good capability of anti-interference to matrixes.

Key words: Inductively coupled plasma mass spectrometry, High effective micro-sampling system, Matrix effects