Comparison of three wet digestion methods for the determination of plant sulphur by inductively coupled plasma atomic spectroscopy (ICP-AES)

A - Papers appearing in refereed journals

Zhao, F-J., McGrath, S. P. and Crosland, A. R. 1994. Comparison of three wet digestion methods for the determination of plant sulphur by inductively coupled plasma atomic spectroscopy (ICP-AES). Communications in Soil Science and Plant Analysis. 25 (3-4), pp. 407-418.

AuthorsZhao, F-J., McGrath, S. P. and Crosland, A. R.
Abstract

Increased incidence of sulphur (S) deficiency in crops has led to a greater need for S determination in plant tissues. Among the methods available for measurement of S, inductively coupled plasma atomic emission spectrometry (ICP‐AES) has been proved to be accurate and rapid. This paper compares digestion with HNO3‐HClO4, fuming HNO3‐KNO3 and alkaline NaOBr prior to the S measurement by ICP‐AES. Both HNO3‐HClO4 and fuming HNO3‐KNO3 were found to give satisfactory results for five certified plant materials, with high accuracy and precision. The HNO3‐HClO4 method involved a rigid temperature control, with slow ramp rates and a final temperature (190°C) lower than the boiling point of HClO4, to minimise the possibility of gaseous losses of S. Both methods can also be used for the simultaneous determination of phosphorus (P), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), copper (Cu), and manganese (Mn), and additionally potassium (K) with HNO3‐HClO4. In contrast, the alkaline NaOBr method was less suitable as a digestion procedure for S measurement by ICP‐AES, because it involved a large dilution factor and produced high blank values.

Year of Publication1994
JournalCommunications in Soil Science and Plant Analysis
Journal citation25 (3-4), pp. 407-418
Digital Object Identifier (DOI)doi:10.1080/00103629409369047
Open accessPublished as non-open access
Funder project or code108
914
221
Output statusPublished
Publication dates
Online11 Nov 2008
PublisherTaylor & Francis Inc
Copyright licensePublisher copyright
ISSN0010-3624

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