Agilent 7500CX Manuals

This article describes a simple, robust and reliable method for the measurement of 21 trace elements in high-purity ammonium paratungstate (APT) using an Agilent 7500cx ICP-MS fitted with a High Matrix Introduction (HMI) system. HMI is a new sample-introduction accessory specially designed for concentrated samples with high total dissolved solids (TDS). Comparing results obtained using different APT sample digestion methods shows that dissolving the material in heated 4% H2O2 minimizes the formation of interferences on difficult elements such as phosphorus and silicon. APT samples containing 1% TDS were analyzed directly using the HMI's ultra robust mode. Results were calculated using the method of standard addition (MSA). Interferences on challenging elements such as Ca, K, Fe, and Si were removed by the Octopole Reaction System (ORS), a standard component of the Agilent 7500cx. The short turnaround time, including sample preparation and analy- sis time, indicates that the method is suitable for onsite testing.

Agilent has further improved the sample throughput capabilities of its 7500cx ICP-MS with Octopole Reaction System (ORS) using a newly configured Integrated Sample Introduction System–Discrete Sampling (ISIS-DS) accessory, and helium collision mode. Employing this new methodology, a complete suite of 30 or more elements can be analyzed in compliance with USEPA criteria (spectrum mode, three replicates, and sub-ppb MDLs) in approximately 75 seconds, sample to sample, with excellent removal of polyatomic interferences. Performance data showing stability, interference control, accuracy, precision, and washout are presented.

Rapid Analysis of High-Matrix Environmental Samples Using the Agilent 7500cx ICP-MS Application

The new Agilent 7500cx allows the user to achieve the full potential of ICP-MS for semiquantitative elemental screening of a wide range of sample types. Complex, unknown samples can be analyzed with better speed, accuracy, and data integrity than ever before, since all matrix interferences are removed in the Octopole Reaction System (ORS) using helium collision mode. Results are presented for three different certified reference materials.

A simple methodology for the measurement of trace and ultratrace metals in edible oils is described.

A method for the measurement of trace elements in malt spirits (whisky) is described with reference to six different samples.