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All Journal PROSIDING SEMINAR KIMIA
Moh Syaiful Arif
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Chemistry

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SINTESIS DAN STABILITAS NANOPARTIKEL PERAK (AgNPs) MENGGUNAKAN TRINATRIUM SITRAT Selvi Yanti; Moh Syaiful Arif; Bohari Yusuf
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Sintesis nanopartikel perak (AgNPs) dibuat dengan metode reduksi kimia. Reaksi antara perak nitrat (AgNO3) dengan trinatrium sitrat akan membentuk nanopartikel perak (AgNPs) yang ditandai dengan perubahan warna yang signifikan dari bening menjadi kuning. Nanopartikel perak (AgNps) yang dihasilkan dikarakterisasi menggunakan Spektrofotometer UV-Vis dalam tahap optimasi agar diperoleh AgNPs yang sudah dalam kedaan optimum dan menghasilkan warna kuning yang stabil. Hasil karakterisasi Spektrofotometer UV-Vis menunjukkan nanopartikel yang paling optimum terdapat pada konsentrasi 1 mM menggunakan suhu pemanasan 850C dengan penambahan trinatrium sitrat sebanyak 7 mL dalam waktu 13 menit. Penggunaan trinatrium sitrat dalam sintesis nanopartikel perak (AgNPs) berperan sebagai reduktor dan stabilisator. Uji stabilitas nanopartikel perak (AgNPs) dilakukan selama 15 hari dan menghasilkan warna yang stabil pada hari ke-7 yang ditunjukkan dengan warna larutan kuning. Kata Kunci: Nanopartikel Perak (AgNPs), Optimasi, Spektrofotometer UV-Vis
MINI REVIEW: PERBANDINGAN KINERJA ELEKTRODA SELEKTIF ION Cu2+ DENGAN BERBAGAI IONOFOR DALAM MATRIKS PVC-DOP Safira Qisthina Wardhana; Alimuddin; Moh Syaiful Arif
PROSIDING SEMINAR KIMIA Vol 4 No 1 (2025): Prosiding SNK 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Copper (Cu) contamination resulting from industrial waste can have detrimental effects on both the environment and human health. To control Cu pollution, a rapid and accurate detection method is required. This study compares the performance of Cu²⁺ ion-selective electrodes using various ionophores in a polyvinyl chloride (PVC) matrix plasticized with dioctyl phthalate (DOP). The ionophores compared include EDTA, Rhodamine 6G, and Schiff base. The evaluated parameters include Nernstian slope, detection limit, linear range, response time, and selectivity. The results indicate that Rhodamine 6G and Schiff base exhibit superior sensitivity and response time, while EDTA provides better long-term stability. Keywords: Ion Selective Electrode, Cu2+ metal, Ionophore
ANALISA KADAR AMONIA DAN UJI LOGAM BERAT (Fe dan Mn) PADA AIR LIMBAH DOMESTIK Tentriati Cahaya; Aman Sentosa Panggabean; Moh Syaiful Arif
PROSIDING SEMINAR KIMIA Vol 4 No 1 (2025): Prosiding SNK 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A study entitled Analysis of Ammonia Levels and Heavy Metals (Fe and Mn) in Domestic Wastewater has been conducted. This research aimed to determine the concentrations of ammonia and heavy metals (Fe and Mn) in domestic wastewater from the drainage channel on Jalan H. M. Ardans (AL 1) and the wastewater treatment plant of PT. LAB (AL 2). Ammonia levels were analyzed using the phenate spectrophotometric method, while heavy metal concentrations (Fe and Mn) were determined using the Atomic Absorption Spectrophotometry (AAS) method. Based on the analysis results, ammonia levels were found to be 0.45 mg/L in AL 1 and 0.08 mg/L in AL 2. The concentration of iron (Fe) was 3.17 mg/L in AL 1 and 0.50 mg/L in AL 2. The concentration of manganese (Mn) was 15.07 mg/L in AL 1 and 0.30 mg/L in AL 2. The ammonia levels in both AL 1 and AL 2 complied with the quality standard of 10 mg/L. The Fe concentrations in AL 1 and AL 2 also met the quality standard of 5 mg/L. The Mn level in AL 2 met the quality standard of 2 mg/L, whereas the Mn level in AL 1 exceeded the permissible limit. Keywords: ammonia, iron (Fe), domestic wastewater, manganese (Mn)
Co-Authors Alimuddin Aman Sentosa Panggabean Bohari Yusuf Safira Qisthina Wardhana Selvi Yanti Tentriati Cahaya