Abstract
This paper describes useful procedures to monitor quality of chloride and nitrate ions analysis in plant samples by ion chromatography. The use of certified reference materials (CRMs) provided an efficient way to verify the accuracy of the method. Data generated by the method of analysis for chloride compared favourably with certified values. The quality system included also the systematic analysis of an internal reference sample in each batch of samples routinely analysed. The performance of the method, including extraction and measurement, over a period of 3 years was reported with control charts. The yearly variation coefficients were less than 6.5% for chloride and nitrate ions. Finally, the analytical method was evaluated through the participation of laboratory to an international proficiency testing scheme. Found results were not significantly different from published medians.
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Masson, P., de Raemaeker, F. & Bon, F. Quality control procedures for chloride and nitrate ions analysis in plant samples by ion chromatography. Accred Qual Assur 10, 439–443 (2005). https://doi.org/10.1007/s00769-005-0026-3
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DOI: https://doi.org/10.1007/s00769-005-0026-3