Using aqua regia to treat iron oxide powder samples can dissolve and clarify the test solution. Use PQ 9100 to test the aluminum, phosphorus, manganese, silicon, and calcium elements in the sample.

High resolution ICP-OES can solve spectral interference from samples through the high-resolution capability of the instrument's optical system, resulting in a clean test spectrum. The optical resolution of PQ 9100 is 0.003nm, suitable for testing complex substrate samples

When tasting, the obtained spectrum is very narrow, and the interference peaks are removed very cleanly.