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All Journal Journal Of Research and Education Chemistry (JREC)
Gala , Selfina
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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ANALISIS PENGARUH PERBEDAAN SUHU DAN WAKTU PENGERINGAN SAMPEL NIKEL ORE TERHADAP HASIL ANALISA LOGAM PADA MATERIAL NIKEL LATERIT MENGGUNAKAN ENERGY DISPERSIVE X-RAY FLUORESCENCE Fadillah, Rifdah; Gala , Selfina
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).24264

Abstract

Analysis of the Influence of Differences in Temperature and Drying Time of Nickel Ore Samples on the Metal Analysis Results of Lateritic Nickel Material Using Energy Dispersive X-Ray Fluorescence. This research aims to determine the effect of variations in temperature and drying time on the testing results of metal content in lateritic nickel samples using the Energy Dispersive X-Ray Fluorescence (EDXRF) method, as well as to evaluate the time efficiency in the sample preparation process. The temperature variations used are 105°C, 118°C, and 130°C, each with drying times of 4 hours, 6 hours, and 8 hours. The elements analyzed include Nickel (Ni), Iron (Fe), Silica (SiO₂), and Magnesium Oxide (MgO). The research results indicate that temperature and drying time have a significant impact on the concentration of the elements. A temperature of 105°C tends to produce valid levels, but with high residual humidity. In contrast, a temperature of 130°C increases heavy metal levels, causing volatility of light elements and significant data deviations. The optimal treatment for Ni and Fe values is found at 118°C and 105°C for 6 hours, while SiO₂ and MgO are only optimal at 105°C for 6 hours. However, if the Company's focus is only on Ni and Fe values, then 118°C and 6 hours are recommended as an efficient treatment in terms of working time and do not cause damage to the mineral structure of the sample, as well as optimal conditions in the drying process of laterite nickel sample preparation for analysis using EDXRF. This condition provides a balance between analysis accuracy, data stability, and time efficiency in the laboratory.
PENGARUH UKURAN PARTIKEL TERHADAP AKURASI ANALISIS SAMPEL PRODUKSI NIKEL MENGGUNAKAN INSTRUMEN SPEKTROMETER X-RAY FLUORESCENCE (XRF ) Mutmainnah Rahman; Gala , Selfina
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).25678

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh ukuran partikel dan metode pengeringan terhadap akurasi analisis kadar nikel menggunakan spektrometer X-Ray Fluorescence (XRF). Penelitian dilakukan di PT. Tiran Indonesia dengan dua variabel bebas, yaitu ukuran partikel 100 mesh dan 200 mesh serta metode pengeringan oven dan sangrai. Pengujian dilakukan pada sampel bijih nikel menggunakan instrumen XRF. Hasil penelitian menunjukkan bahwa semakin kecil ukuran partikel, khususnya pada ukuran 200 mesh, semakin tinggi tingkat akurasi analisis yang dicapai. Metode pengeringan oven memberikan hasil yang lebih akurat dibandingkan metode sangrai, terutama pada ukuran partikel 200 mesh. Akurasi pada metode oven mencapai rata-rata deviasi yang lebih rendah dibandingkan metode sangrai, terutama pada unsur SiO2 dan Fe. Penelitian ini menyimpulkan bahwa ukuran partikel dan metode pengeringan berpengaruh signifikan terhadap akurasi analisis XRF.
Evaluasi Penggunaan Kemasan PVC, PVDC, dan HDPE terhadap Stabilitas Fisik dan Kimia Produk Kapsul Izdihar Putri, Salsabila Nur; gala , SELFINA
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).27897

Abstract

The physical and chemical stability of health supplement capsules is influenced by the packaging materials used, particularly their barrier capacity against moisture and oxygen. However, comparative studies on the effectiveness of PVC, PVDC, and HDPE packaging materials in maintaining capsule stability remain limited. This study evaluated the effects of PVC, PVDV, and HDPE packaging on the stability of L-glutathione capsules. The research was conducted using an experimental stability design under accelerated condition at 40°C ± 2°C and 75% ± 5% Relative Humidity, with time intervals of 10, 20, and 30 days. Stability testing followed product specifications, encompassing parameters such as appearance, weight variation, disintegration time, moisture content, and L-glutathione content (active ingredient). Results revealed that PVC packaged samples exhibited noncompliance in several parameters, including appearance, weight variation, and L-glutathione content. In contrast, PVDC and HDPE packaging maintained compliance across all tested parameters throughout the storage period. PVDC demonstrated the best performance in maintaining the highest L-glutathione content consistently across all observation intervals. Statistical analysis using two-way ANOVA with two replications revealed that packaging type, storage duration, and their interaction significantly influenced L-glutathione content (p < 0,05). These findings provide important implications for the pharmaceutical and supplement industries in determining optimal packaging materials, as well as for regulatory authorities in strengthening the evaluation of packaging suitability to ensure product quality, safety, and efficacy during storage.
Co-Authors Fadillah, Rifdah Izdihar Putri, Salsabila Nur Mutmainnah Rahman