This application note describes the implementation of US EPA 200.7 guidelines for the analysis of trace elements in water using the Agilent SVS 2, a new and innovative sample introduction system for the Agilent 720/730 Series ICP-OES.
This document details a method for determining trace elements in water conforming to US EPA 200.7 guidelines. It utilizes the Agilent SVS 2, a next-generation sample introduction system designed for the Agilent 720/730 Series ICP-OES to improve sample throughput and reduce operating costs. The SVS 2 maintains a constant flow of solution to the plasma, eliminating the need for long stabilization delays required by conventional systems.
The analysis was performed using an Agilent 720 Series simultaneous ICP-OES with an axially viewed plasma and SPS 3 Sample Preparation System. The document provides specific operating parameters for the instrument and the SVS 2, lists the calibration standards and quality control solutions prepared according to EPA 200.7, and presents the resulting linear dynamic ranges and method detection limits for 32 elements.
| Plasma gas flow | 15 L/min |
|---|---|
| Auxiliary gas flow | 1.5 L/min |
| Nebulizer flow | 0.7 L/min |
| Pump speed | 12 rpm |
| Sample uptake delay time | 12s |
| Stabilization time | 0s |
| Replicate read time | 20s |
| Number of replicates | 2 |
A stabilization of less than 10 seconds is sufficient to load the sample loop and inject the sample into the plasma to attain a stable signal.
The SVS 2 improves sample introduction efficiency by greatly reducing sample uptake and washout times, which can more than double sample throughput.
The method analyzes 32 elements in drinking and waste waters, including Ag, Al, As, B, Ba, Be, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Se, Si, Sn, Sr, Ti, Tl, V, and Zn.