CALIBRATION OF SOIL NUTRIENT MEASUREMENTS WITH MULTIPLE EXTRACTIONS USING INDUCTIVELY COUPLED PLASMA (ICP)

Tia Rostaman; L. Anggria; A. Kasno

doi:10.24246/agric.2022.v34.i2.p183-196

Tia Rostaman Indonesian Soil Research Institute, Bogor
L. Anggria Indonesian Soil Research Institute, Bogor
A. Kasno Indonesian Soil Research Institute, Bogor

DOI: https://doi.org/10.24246/agric.2022.v34.i2.p183-196

Keywords: ICP, best extraction, critical limit and adequacy limit, macro and micronutrients

Abstract

Inductively Coupled Plasma (ICP) instrument is a tool used to measure nutrients in the soil, plants, fertilizers, and water, good measurement requires a specific extraction. This study was conducted from March to November 2013 at the Soil Testing and Research Laboratory, Indonesian Soil Research Institute. The soils were collected from the Banten, West Java, and Central Java. The experiment was carried out by the statistical method of two means. The soil used was 100 g of wind-dried soil, which was analyzed by extracting Morgan Venema, Wet Ashing HNO₃ and HClO₄, Morgan Wolf. The observation was made on the chemical properties of the soil with various concentrations and several extracts. The best extraction was determined based on the value of R2 and the significance of the regression equation between the results of soil analysis of several extractions with the percent yield and nutrient uptake as measured by ICP and AAS tools. The experimental results showed that the ICP-OES and AAS tools could be used with some extractions. This was indicated by the significant regression coefficient data on various extraction. The parameters K, Ca, Mg, Fe, Mn, Cu, and Zn were obtained in the HNO₃ and HClO₄ extraction, which could be said to be the best extractions used in ICP and AAS equipment. Morgan Wolf extract obtained insignificant results on Cu measurements. This showed that the Cu parameters in the Morgan Wolf extract were not suitable for analysis with ICP.

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