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All Journal Indonesian Journal of Chemistry Abimanyu: Journal of Community Engagement Unesa Journal of Chemistry Journal of The Indonesian Society of Integrated Chemistry
Maria Monica Sianita Basukiwardojo
Chemistry Department, Faculty Of Mathematics And Natural Sciences State University Of Surabaya, Surabaya
Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Materials Science & Nanotechnology Social Sciences

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 1 
THE EFFECT OF DISTILLATE STORING DISTILLED FROM FRUCTOSE SYRUPS TOWARD ITS ACETALDEHYDE CONCENTRATION MEASURED BY GAS CHROMATOGRAPHY Maria Monica Sianita Basukiwardojo
Indonesian Journal of Chemistry Vol 5, No 2 (2005)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (172.058 KB) | DOI: 10.22146/ijc.21821

Abstract

Acetaldehyde is a compound of aldehyde group that is very volatile and toxic. This compound can be found in fructose syrups used in carbonate beverages. The syrups had been distilled then analysed using gas chromatography. The concentration of acetaldehyde was 289.78 g/g in the distillates kept for one week, 295.30 g/g in those kept for two weeks, 429.45 g/g in those kept for three weeks, and 449.38 g/g in those kept for four weeks. The optimum column temperature was programmed with initial temperature of 40 oC held on for four minutes, then increasing by 40 oC/minute to 200 oC. It can be concluded that the longer the distillates have been kept, the greater the concentration of acetaldehyde in the distillates. A further research to investigate the present of microbe in the distillates and the effect of pH should be conducted.
Analisa Kadar Kalori, Kadar Air, dan Masa Simpan dengan Menggunakan Teknologi Pengiris Guna Produktifitas Produk Keripik Singkong Handajani, Sri; Yasin, Ach; Basukiwardojo, Maria Monica Sianita; Kusumawati, Nita; Kurniawan, Muhammad Ridho Hafid; Rahayu, Nunik Tri; Estiningtyas, Indri Wasa
Abimanyu : Jornal of Community Engagement Vol 5 No 2 (2024): August 2024
Publisher : Universitas Negeri Surabaya

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Abstract

Cassava can be processed into chips, which have a special appeal with their distinctive flavour and crunchy texture. Cassava chip production creates profits for cassava farmers and is a major industry in some regions. Improving product quality involves various control measures, including handling and packaging of the final product. The frying and draining process is an important factor in extending the shelf life and inhibiting oxidation of a product. The purpose of this study was to determine the effect of the use of appropriate technology (TTG) draining machines on the nutrition and shelf life of cassava chips products. The results showed that the total fat, saturated fat, protein and carbohydrate content of cassava chips products as a result of TTG were 4.91%; 2.26%; 3.11%; 81.01%, respectively. The shelf life of the chips was 5.25 months (157.5 or 158 days). The results of the organoleptic test of cassava chips in terms of colour, aroma, texture and overall liking level received a positive response from the community, both teenagers and adults. The aspects of aroma, taste, texture and colour as well as the overall level of liking with a percentage level of 80% (seblak daun jeruk), 58% (fried chicken), 61% (rendang), and 56% (grilled chicken).
A SINTESIS KITOSAN DARI CANGKANG KERANG DARAH (Anadara granosa) SEBAGAI BIOSENSOR UNTUK DETEKSI PESTISIDA MENGGUNAKAN MEMBRAN Au/KITOSAN Pharnanda, Rossella; Prasetya, Predian Yudha; Handayani, Suci Tri; Fatehah, Aura Amalia; Basukiwardojo, Maria Monica Sianita
Unesa Journal of Chemistry Vol. 13 No. 1 (2024): Vol 13 No 1 (2024)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

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Pesticides are chemicals that can kill or control pests. However, the current use of pesticides poses a threat to humans and the environment. This research aims to develop a biosensor with Au/Chitosan membrane electrode using chitosan from blood clam shell waste which has high sensitivity to pesticides, fast response time, and long-term stability. So as to achieve the target of Sustainable Development Goals (SDG's) 3, namely health and well-being. The method used is the preparation of blood clam shells, synthesis of chitosan from blood clam shells, making Au/Chitosan membrane electrodes, characterisation of pesticide detection biosensors. The results of FTIR testing of chitosan obtained a degree of deacetylation of 86.3202%. The successfully made Au/Chitosan membrane electrode has an optimum concentration of 5% with the best measurement at pH 7, deposition time of 5 seconds, and scan rate of 0.1 V/s.  Characterisation of carbamate pesticide detection biosensor using Au/Kitosan electrode shows that the Nernst factor obtained is 35.46 mV/decade, detection limit is 2x10 -8 M, measurement range is 10-8 M to 10-2 M, response time is 5-7 minutes, and precision with coefficient of variation for 10-4 M and 10-2 M concentration is 1.095% and 0.412% so that the Au/Chitosan membrane electrode can be used to detect carbamate pesticides effectively.
Kinetics and Adsorption Efficiency of Fe(III) by Fe-IIP Adsorbent for Water Remediation Surya, Felisa Nadia Oktavira Putri; Basukiwardojo, Maria Monica Sianita
Journal of The Indonesian Society of Integrated Chemistry Vol. 17 No. 2 (2025): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v17i2.49878

Abstract

Iron (Fe) is an essential metal that plays a vital role in various biological and environmental processes. However, excessive concentrations of Fe, particularly in the form of Fe(III), can cause toxic effects, disrupt aquatic ecosystems, and pose serious risks to human health. This study aims to develop a selective adsorbent based on an Fe(III)-imprinted polymer (Fe(III)-IIP) for removing Fe(III) contamination from water. The Fe(III)-IIP was synthesized through precipitation polymerization using Fe(NO3)3, EDTA, MAA, EGDMA, and BPO as the main components. FTIR spectroscopy confirmed the presence of Fe–O functional groups and the successful removal of template ions. SEM analysis revealed a porous surface morphology with a uniform particle distribution, supporting enhanced adsorption capacity. Adsorption experiments were performed at contact times ranging from 30 to 180 minutes to determine the optimum condition. The results showed that adsorption efficiency increased with contact time, reaching equilibrium at 30 minutes with an adsorption capacity of 4.43 mg g-1, consistent with a pseudo-second-order (PSO) kinetic model. These findings demonstrate that Fe(III)-IIP is an effective adsorbent for treating Fe(III)-contaminated water. Keywords:        Adsorption, Fe(III), IIP, Contact time
Optimization of Ion-Ligand Stoichiometry in Synthesis of Ionic Imprinted Polymer for Selective Fe(III) Adsorption Auliya, Tazkiya; Basukiwardojo, Maria Monica Sianita
Journal of The Indonesian Society of Integrated Chemistry Vol. 17 No. 2 (2025): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v17i2.49889

Abstract

This study investigates the influence of the complex structure formed between the template ion and the ligand on the adsorption efficiency of metal ions by Ionic Imprinted Polymer (IIP). The IIP was synthesized with ion-template/ligand stoichiometric ratios of 1:1, 1:2, 1:3, 1:4, and 1:5 via precipitation polymerization. Materials used in synthesis are Fe(NO₃)₃ as the template ion, EDTA as the ligand, MAA as the functional monomer, EGDMA as the cross-linker, and BPO as the initiator. Adsorption experiments confirmed that the IIP prepared with a 1:1 Fe(III)/EDTA ratio exhibited the highest maximum adsorption capacity of 5.18 mg/g, outperforming other stoichiometric compositions. Characterization of the IIP(1:1) using FTIR confirmed the presence of functional groups corresponding to Fe-EDTA interactions in the Non-Imprinted Polymer (NIP), while such interactions were absent in the IIP, indicating successful template removal and the formation of binding cavities suitable for selective metal ion adsorption.  EDX analysis also revealed a difference in Fe(III) content, with the NIP at 0.52% and the IIP at 0.36%. Results reveal that the IIP exhibits selective adsorption toward the target ion, indicating its potential for selective metal ion separation and environmental remediation
Co-Authors Ach. Yasin Auliya, Tazkiya Estiningtyas, Indri Wasa Fatehah, Aura Amalia Handayani, Suci Tri Kurniawan, Muhammad Ridho Hafid Nita Kusumawati Pharnanda, Rossella Prasetya, Predian Yudha Rahayu, Nunik Tri Sri Handajani Surya, Felisa Nadia Oktavira Putri