Update: 30 September, 2023
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.
File format: PDF
Size: -
MD5 Checksum: 31972376718E478007CB1183565B2138
Publication date: 02 July, 2012
Downloads: -