FARMASIS: Jurnal Sains Farmasi Volume 1 No. 1 September 2020 6 Validation Method of Flame Atomic Absorption Spectrometry (FAAS) of Dry Ashing and Wet Ashing Method for Mineral Analysis in Isotonic Water Metode Validasi Flame Atomic Absorption Spectrometry (FAAS) Metode Destruksi Kering dan Destruksi Basah untuk Analisis Mineral Minuman Air Isotonik Asti Rahayu Faculty of Health Sciences, University of PGRI Adi Buana Surabaya Received: 24/6/2020 Accepted: 19/7/2020 Published: 26/9/2020 Korespondensi: astirahayu@unipasby.ac.id ABSTRACT Assay of inorganic cations in some drinks was an important quality control. Validation method of (Flame Atomic Absorption Spectrometry) FAAS provides an assurance of reliability for determination of metal Potassium (potassium) in isotonic water. Sample of isotonic water was destructed by dry ashing method and wet ashing. FAAS for determination of metals has been validated. The developed method was linear over the concentration ranges 100.0 – 300.0 μg/mL of Potassium. The correlation coefficient (r) was higher than 0.99. Limit of detection (LOD) of Potassium, was found 1.3448 μg/mL, while limit of quantitation (LOQ) was found 4.4827 μg/mL (K). Statistical analysis by independent T-test showed that the degree of confidence (α = 0.05) got the value of the F count of 7,288 while the value of F table at 0.27 and the p-value was 0,000, which means it was smaller than α = 0.05. The F value was more than the F table. The p- value was less than 0.05 indicates that there was no significant difference between wet ashingmethod and dry ashing method Keywords: Flame Atomic Absorption Spectrometry, dry ashing, wet ashing, method validation ABSTRAK Pengujian kation anorganik dalam beberapa minuman merupakan kontrol kualitas yang penting. Metode validasi (Flame Atomic Absorption Spectrometry) FAAS memberikan jaminan keandalan untuk penentuan logam Kalium (kalium) dalam air isotonik. Sampel air isotonik dihancurkan dengan metode destruksi kering (dry ashing) dan destruksi basah (wet ashing). FAAS untuk penentuan logam telah divalidasi. Metode yang dikembangkan linier pada rentang konsentrasi 100,0 - 300,0 μg / mL Kalium. Koefisien korelasi (r) lebih tinggi dari 0,99. Batas deteksi (LOD) Kalium diperoleh 1,3448 μg / mL, sedangkan batas kuantitasi (LOQ) diperoleh 4,4827 μg / mL (K). Analisis statistik dengan independent T-test menunjukkan bahwa derajat kepercayaan (α = 0,05) didapatkan nilai F hitung sebesar 7,288 sedangkan nilai F tabel sebesar 0,27 dan p-value sebesar 0,000 yang artinya lebih kecil dari α = 0,05. Nilai F lebih dari F tabel. Nilai p yang lebih kecil dari 0,05 menunjukkan bahwa tidak ada perbedaan yang signifikan antara metode destruksi basah dan metode destruksi kering Kata kunci: Flame Atomic Absorption Spectrometry, destruksi kering, destruksi basah, validasi metode brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by Multi hosted jurnal Universitas PGRI Adi Buana Surabaya