The Apex Omega desolvating nebulizer is the highest performing ICPMS sample introduction system available. An innovative combination of a multistage Peltier-cooled desolvation system in series with a helical EPTFE fluoropolymer membrane desolvator simultaneously maximizes ICPMS sensitivity and minimizes oxides.
|APX-O||Apex Omega high performance membrane desolvation system with quartz spray chamber|
|APX-O-HF||Apex Omega HF high performance membrane desolvation system with PFA spray chamber|
Minimizing the amount of Nd required to obtain desired precision (> 50 ppm) and throughput for precious oceanographic samples is illustrated in two figures. First, internal precision is for plotted for variable amounts of Nd injected at 100 µL/min for two minutes. Less than 50 ppm (2 RSD) internal precision is obtained for 2 ng samples of Nd. Repeat analysis of reference materials JNdi and La Jolla indicate that the external precision for 2 ng of Nd is similar to the 50 ppm internal precision and appropriate for oceanographic applications.
The Apex Omega sweep & N2 gas flows are optimized via software controlled MFC's. The stability of gas flow regulation is proven by 235U/238U mass bias stabilities that are typically better than 60 ppm (1 RSD) over analytical sessions of 15+ hours.
The microFAST MC and the Apex Omega provide high precision potassium isotope ratios with greatly reduced uptake and wash times, thereby improving frequency of sample standard bracketing.