This document introduces the advantages of Agilent 7700x ICP-MS technology in drinking water analysis. This technology uses the 3rd generation Octopole Reaction System (ORS3) technology to effectively remove polyatomic interferences. He mode is simple and easy to use, and the 7700x ICP-MS can remove all polyatomic interferences in a single set of conditions without requiring any prior knowledge about the sample, and without the need for complex mathematical corrections. This makes setup easier, detection limits are lower, analysis is faster, and interference removal is improved, especially for the difficult plasma-based interferences affecting iron and selenium. Currently, Se detection limits of less than 20ppt are routinely achievable in He mode.
The Agilent 7700x ICP-MS utilizes 3rd generation Octopole Reaction System (ORS) technology to improve the performance of helium collision mode for removing polyatomic interferences in environmental analysis. This system allows for the removal of all polyatomic interferences under a single set of conditions without requiring complex mathematical corrections or previous knowledge of the sample.
The document presents data demonstrating the instrument's sensitivity and accuracy, showing method detection limits for various elements in drinking water. It highlights the ability to achieve selenium detection limits less than 20 parts per trillion (ppt) and discusses the robustness of the High Matrix Introduction (HMI) system for analyzing samples with high total dissolved solids.
| Selenium detection limit (He mode) | less than 20 ppt |
|---|---|
| Vanadium BEC (He mode) | 7.7 ppt |
No, the 7700x ICP-MS removes all polyatomic interferences under a single set of conditions without requiring reactive cell gases.
It has the largest operating dynamic range of any quadrupole ICP-MS.