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Ajuk Sapar
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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia
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INDONESIA
Indonesian Journal of Pure and Applied Chemistry
Published by Universitas Tanjungpura
ISSN : 26208571     EISSN : 2620858X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry
Indonesian Journal of Pure and Applied Chemistry (IJoPAC) was first established in 2018 as a scientific journal that accommodates researchers and education practitioners to publish scientific work and research results which are the results of experiments or literature studies in the field of chemistry. Publications are carried out periodically with three issues (January-April, May-August, September-December) in one volume per year. Published scientific work can be in the form of original articles, short communications and review results covering the fields of Physical chemistry, Organic chemistry, Analytical chemistry, Inorganic chemistry, Biochemistry / Biological Chemistry, Applied Chemistry. Focus and Scope of Indonesian Journal of Pure and Applied Chemistry covering the fields : Physical chemistry Organic chemistry Analytical chemistry Inorganic chemistry Biochemistry/Biological Chemistry Applied Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 124 Documents
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MODIFIKASI NANOPARTIKEL PERAK DENGAN ASAM p-HIDROKSIBENZOAT DAN GLISIN UNTUK DETEKSI KOLORIMETRI ION Ni²⁺ Sari, Gladis Raspida; Gusrizal, Gusrizal; Ardiningsih, Puji
Indonesian Journal of Pure and Applied Chemistry Vol 8, No 3 (2025)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v8i3.78551

Abstract

Silver nanoparticles (AgNPs) are well known for their unique physicochemical properties and have been widely applied in sensing technologies, particularly as colorimetric sensors for metal ions. In this study, AgNPs were synthesized using p-hydroxybenzoic acid, which functioned as both a reducing and capping agent to ensure controlled particle growth and stability. The aim was to develop a simple and sensitive method for detecting Ni²⁺ ions using these AgNPs, with glycine added as a ligand to enhance the sensing performance. The detection was based on observable color changes and absorbance shifts in the UV-Vis spectrum resulting from interaction between AgNPs and Ni²⁺ ions. The results showed that the presence of glycine significantly enhanced the AgNPs’ response to Ni²⁺, indicating a synergistic effect that improved detection sensitivity. The method demonstrated good linearity, with a coefficient of determination (R²) of 0.993. The calculated limit of detection (LOD) was 3.0 × 10⁻⁴ M, and the limit of quantification (LOQ) was 9.9 × 10⁻⁴ M. Precision analysis showed that the percent relative standard deviation (%RSD) was within acceptable limits, remaining below two-thirds of the coefficient of variation (%CV) defined by the Horwitz equation. These findings confirm that the modified AgNP-based system is both reliable and effective for the colorimetric detection of Ni²⁺ ions in solution.
IMPACT OF CLARIFYING AGENTS ON THE OPTICAL CLARITY OF PIGMENTED POLYPROPYLENE RESIN: A COMPLIANCE AND MIGRATION STUDY Wulansari, Isma; Azhari, Mohamad Yusuf
Indonesian Journal of Pure and Applied Chemistry Vol 8, No 3 (2025)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v8i3.94546

Abstract

Efforts to improve visual clarity and color stability in polypropylene (PP)-based products are carried out by adding clarifying agents, namely a sorbitol-based clarifying agent (PA) and a dibenzylidene sorbitol clarifying agent (NX), which function to accelerate crystal nucleation in within the polymer matrix. PP is widely used for packaging and automotive applications due to its clarity and transparency. This study was conducted to examine compliance and migration studies, assessing the suitability of the additives against quality standards and their migration stability. Migration tests were conducted visually using polyvinyl chloride (PVC) sheets at 55°C, with a 16-hour heating process. Additionally, a complaint analysis based on a digital prototype form was developed to identify the root causes of customer complaints related to color inconsistency, using the 4M approach (Man, Material, Machine, Method). The formulation includes dye pigments (small in size and easily migratable), organic pigments (more stable), and polyethylene wax as an internal lubricant. The results showed that 6 out of 7 samples with dye pigments experienced color migration (intensity 1–2), while organic pigments showed no migration (intensity 0). Clarifying agent improved clarity but failed to prevent pigment migration. Findings suggest that future research should focus on optimizing clarifying agents and additives to enhance pigment stability and durability.
SINTESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK DAUN PAKIS (Stenochlaena sp.) SEBAGAI BIOREDUKTOR Yuniarsih, Dwi; Gusrizal, Gusrizal; Alimuddin, Andi Hairil
Indonesian Journal of Pure and Applied Chemistry Vol 8, No 3 (2025)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v8i3.86094

Abstract

The use of biological reductants has been identified as a more environmentally friendly approach in nanoparticle synthesis than the use of chemical reductants, which can produce hazardous waste. The aims of this study were synthesize silver nanoparticles using fern leaf extract (Stenochlaena sp.) as a bioreductor and stabilizing/protecting agent, as well as to test the stability of the resulting silver nanoparticles and perform characterization. Synthesis of silver nanoparticles involves the reaction of a silver nitrate solution with a fern leaf extract solution in boiling water. Stability of the silver nanoparticles as observed over a period of one month indicated a decline in stability. FTIR spectrum analysis demonstrated indicating a direct involvement of the extract in the reduction process as well as the presence of Ag-O bonds in the FTIR spectrum of silver nanoparticles. TEM analysis revealed that the size of the silver nanoparticles ranged from 3 to 16 nanometers, with a relatively spherical morphology. PSA demonstrated that the silver nanoparticles had a zeta potential value of +12.7 mV. This study offers insight into the potential of fern leaf extract as a bioreductor in the synthesis of silver nanoparticles and the physical chemical characteristics of the resulting nanoparticles.
KARAKTERISASI BIODEGRADABLE FOAM DARI LIMBAH KULIT SINGKONG MENGGUNAKAN PENDEKATAN METODE BIOKATALIS Kurniawan, Dodi; Rezki, Amelia Sri; Wulandari, Yeni Ria; Variyana, Yeni; Silmi, Fadian Farisan
Indonesian Journal of Pure and Applied Chemistry Vol 8, No 3 (2025)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v8i3.98603

Abstract

Biodegradable foam made from natural starch offers a sustainable alternative to Styrofoam, which is lightweight, low-cost, but challenging to degrade and harmful to the environment. The purpose of this study is to utilize cassava peel waste, which contains starch, as a raw material for producing biodegradable foam using a biocatalyst method approach, thereby reducing the presence of cyanide acid in cassava peel waste. Aside from that, Carboxy Methyl Cellulose (CMC) is used as a filler to strengthen the structure of biodegradable foam with mass variations of 4, 6, and 8 g. The characteristic cassava peel flour results showed that the biocatalyst method, achieved through fermentation, can reduce cyanide acid levels in cassava peel flour. Then, a biodegradable foam with the best characteristics was produced by adding 6 g of CMC, resulting in a thickness of 1.9 mm, a water absorption capacity of 17.45%, a tensile strength of 3.13 MPa, and a biodegradation level of 100%. The resulting biodegradable material exhibits a tensile strength that exceeds that of Styrofoam and can disintegrate completely in the soil.

Page 13 of 13 | Total Record : 124

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