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All Journal Chimica et Natura Acta Anjoro : International Journal of Agriculture and Business
Umar, Wakhid Khoirul
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Environmental Science Materials Science & Nanotechnology

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Validation of calcium (Ca) analysis in dolomite fertilizer using atomic absorption spectrophotometer (AAS) Agustiyar, Fandika; Umar, Wakhid Khoirul; Guritno, Agung
Anjoro: International Journal of Agriculture and Business Vol 3 No 1 (2022): Anjoro
Publisher : Agribusiness Department, Agriculture and Forestry Faculty, Universitas Sulawesi Barat, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/anjoro.v3i1.1417

Abstract

The method of determining calcium (Ca) in dolomite fertilizer has been validated using atomic absorption spectrophotometer (AAS). Determining calcium (Ca) in dolomite fertilizer refers to the Indonesian National Standard (SNI) 02-2804-200. Based on the results of the calcium (Ca) test on dolomite fertilizer, the correlation coefficient (r) was 0.9949, and the % relative standard deviation (RSD) was 0.6472%, less than 2/3 CV Horwitz of 1.5963. The accuracy value is 100.30%, the precision value is 0.6471%, the detection limit for the LOD method is 0.2817, the LOQ is 0.9390, and the instrument detection limit is LOD 0.1159 and LOQ 0.3864. This study shows that the determination of calcium (Ca) in dolomite fertilizer using the SNI method using the Atomic Absorption Spectrophotometer (AAS) can be used with valid results.
Nitrogen Determination in Leaves Palm Oil using The San++ Scalar Continuous Flow Analyzer Following Wet Digestion with 50ml Dilution Sulfuric Acid: Testing and Validation Umar, Wakhid Khoirul; Arwendah, Helen; Sustiyani, Etik
Chimica et Natura Acta Vol 11, No 3 (2023)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v11.n3.48210

Abstract

Co-Authors Agustiyar, Fandika Arwendah, Helen Guritno, Agung Sustiyani, Etik