Advantages of Cross-Flow/Scott Sample Introduction for U.S. EPA 200.7 with the Avio 550 Max ICP-OES

The Avio^® 550 Max fully simultaneous ICP-OES is available with the choice of two standard sample introduction systems: Concentric/Cyclonic or Cross-Flow/Scott. When analyzing waters following U.S. EPA Method 200.7, the Concentric/Cyclonic sample introduction system is more commonly used due to its higher sensitivity. However, for monitoring wastewater samples which generally contain higher analyte concentrations, the Cross-Flow/Scott system is an excellent alternative.

This work demonstrates the ability of the Avio 550 Max ICP-OES with the Cross-Flow/Scott sample introduction to meet or exceed the requirements of EPA 200.7 for both stability and detection limits, with or without the use of an internal standard. Since internal standards typically compensate for instrumental drift, the outstanding stability without use of an internal standard is a testament to the Avio 550 Max’s design characteristics which include Flat Plate^TM plasma technology, PlasmaShear^TM, and dual view capability.