Agilent has introduced unique Dichroic Spectral Combiner DSC technology with

Agilent has introduced unique dichroic spectral

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Agilent has introduced unique Dichroic Spectral Combiner (DSC) technology with the 5100 SVDV ICP- OES so that Easily Ionized Elements (EIE) such as sodium and potassium can be measured radially while other elements are measured axially, allowing % level and ppb level elements to be determined at the same time, in the same reading. The DSC achieves this by combining axial and radial light measurements from the vertical plasma, over the entire wavelength range, in a single measurement that is read by the high speed VistaChip II CCD detector. The vertical torch position of the 5100 leads to excellent plasma robustness and long term stability, especially for challenging sludge and trade wastes samples that can be run using the 200.7 method. The outcome is a reduced number of reruns of samples and quality control (QC) solutions, resulting in even higher sample throughput. To keep the operation of the 5100 as simple as possible, the instrument includes a plug-and-play torch that automatically aligns the torch and connects all gases for fast start up while ensuring reproducible loading of the torch from operator-to-operator and lab-to- lab. In addition, software applets that include pre-set method templates e.g. compliant with US EPA 200.7 requirements, can be developed using the ICP Expert software to ensure fast startup with minimal user training. This note describes the use of the Agilent 5100 SVDV ICP-OES for the ultra-fast determination of trace elements in water CRMs following US EPA method 200.7 guidelines. Instrumentation All measurements were performed using an Agilent 5100 SVDV ICP-OES with Dichroic Spectral Combiner (DSC) technology that runs axial and radial view analysis of a vertically orientated plasma at the same time. The sample introduction system consisted of a Seaspray nebulizer, single-pass glass cyclonic spray chamber, white-white pump tubing and a standard 1.8 mm injector torch. The in strument uses a solid- state RF (SSRF) system operating at 27 MHz to deliver a robust plasma capable of excellent long term analytical stability. An SPS 3 autosampler with the SVS 2+ switching valve was used to deliver samples to the instrument. The SPS 3 was setup with a 1.0 mm ID probe. The instrument operating conditions used are listed in Table 1 and SVS 2+ settings are given in Table 2. Tables 1 and 2 list the operating conditions used for the ICP-OES and the SVS 2+ during this analysis. Table 1. Agilent 5100 SVDV ICP-OES operating parameters Parameter Setting Read time (s) 20 Replicates 2 Sample uptake delay (s) 0 Stabilization time (s) 10 Rinse time (s) 0 Pump Speed (rpm) 12 Fast pump (rpm) Off RF power (kW) 1.50 Aux flow (L/min) 1.0 Plasma flow (L/min) 12.0 Nebulizer flow (L/min) 0.7 Viewing height ( mm ) 5 Background Correction Off-Peak 2
18 AGILENT TECHNOLOGIES Environmental Applications Table 2. SVS 2+ Switching Valve System settings Parameter Setting Sample loop size (mL) 1.0 Loop uptake delay (s) 7.0 Uptake pump speed (rpm) - refill 355 Uptake pump speed (rpm) – move 355 Uptake pump speed (rpm) – inject 100 Time in sample (s) 6.6 Bubble inject time (s) 6.8

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