ICP-MS has been used in the semiconductor industry as a trace element analyzer and has gained attention as the preferred method for measuring metal elements in potable and industrial waters. This technical note focuses on the on-line dilution capability of the 7500 ICP-MS Series Integrated Sample Introduction System (ISIS) and the additional dynamic range achieved through automatic dilution using the intelligent sequencing software.
The document details how the Integrated Sample Introduction System (ISIS) enables automatic on-line dilution for the 7500 ICP-MS Series. It explains that samples exceeding the upper calibration limit are automatically diluted and re-measured without manual intervention, utilizing intelligent sequencing software to expand the dynamic range by a factor of 10-20x.
ISIS supports autodilution factors of 5, 10 and 20X by volume.
Samples beyond the measurable concentration range are automatically diluted and measured again without intervention.
The reproducibility was very good, with %RSDs less than 2% for 5x, 10x, and 20x dilutions.