NDLI: Validation of analytical methods used for determination of nitrate in soil

Content Provider	Springer Nature Link
Author	Kmecl, V. Sušin, J. Zupančič Kralj, L.
Copyright Year	2005
Abstract	The standard method (ISO/DIS 14255) and the quick test were used for determination of nitrate in soil. We validated both methods using parameters such as accuracy, reproducibility within 1 day and between days, limit of detection and limit of quantification. The accuracy of the results was determined using the analysis of samples from the international interlaboratory scheme WEPAL. The accuracy of the standard method was good, while for the quick test the results were not accurate. The standard method showed a solid reproducibility of measurement results (in 1 day, relative standard deviation, RSD=0.2%; between days, RSD=0.8%). The quick test gave poorer results (in 1 day, RSD=6%; between days, RSD=7%). We tried to established the compatibility of both methods on real soil samples and we were satisfied to obtain the correlation coefficient 0.98 using the regression straight line. The analyses with the quick field instrument are much simpler and cheaper than the standard laboratory analyses and can be used for advising on nitrogen fertilisation.
Starting Page	172
Ending Page	176
Page Count	5
File Format	PDF
ISSN	09491775
Journal	Accreditation and Quality Assurance
Volume Number	10
Issue Number	4
e-ISSN	14320517
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-03-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nitrogen Validation Segmented flow analyser Quick field instrument
Content Type	Text
Resource Type	Article
Subject	Chemistry Instrumentation Chemical Engineering Safety, Risk, Reliability and Quality

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