Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Indonesian Journal of Chemistry
Yaqin, Ahmad Akhib Ainul
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Chemistry

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Syringe Solid-Phase Extraction for Cu(II) in Powder Milk Using Alginate-Chitosan-PVA Adsorbents: Method Development and Application Yaqin, Ahmad Akhib Ainul; Siswanta, Dwi; Suherman, Suherman
Indonesian Journal of Chemistry Vol 26, No 2 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.112867

Abstract

This research designed and optimized a syringe solid-phase extraction (SPE) technique employing a modified chitosan, alginate, and PVA (CAP) adsorbent for the determination and preconcentration of Cu(II) ions in powdered milk samples. The material was characterized using FTIR, SEM-EDX, and XPS analyses, which confirmed the detection of predominant –COOH, –NH2, and –OH functional groups. Optimization of the method was performed using both the one-variable-at-a-time (OVAT) approach and the central composite design (CCD) method. Parameters such as pH, CAP dosage, number of samples, and eluent (including HNO3) were evaluated. Optimal OVAT conditions were pH 4.0, 100 mg CAP, 5 samples, and eluent cycles with 2.0 M HNO3, achieving a 100-fold preconcentration. CCD optimization yielded similar results, with slight variations: optimal pH 4.3, CAP mass 105 mg, and 5 eluent cycles with 2.0 M HNO3. CAP exhibited high selectivity (90–99%) and was reusable for up to three adsorption–desorption cycles. Validation using reference material (ERM–BD151) resulted in a recovery of 95.4% for Cu(II). Application of the validated method to real milk samples yielded recoveries of 90.8–97.8%, demonstrating high accuracy. These findings suggest that syringe SPE using CAP is an efficient technique for Cu(II) preconcentration in food matrices.
Co-Authors Dwi Siswanta Suherman, Suherman