Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal Indonesian Journal of Chemistry Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurna Beta Kimia Chemistry Notes
David Tambaru
Department Of Chemistry, University Of Nusa Cendana, Jl. Adi Sucipto, Penfui, Kupang 85001, Indonesia; School Of Chemistry, The University Of Melbourne, Masson Road, Parkville 3052, Australia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Improving the Performance of Polymer Inclusion Membranes in Separation Process Using Alternative Base Polymers: A Review Fidelis Nitti; Odi Theofilus Edison Selan; Bosirul Hoque; David Tambaru; Muhammad Cholid Djunaidi
Indonesian Journal of Chemistry Vol 22, No 1 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68311

Abstract

Polymer inclusion membrane (PIM) has recently evolved as an alternative separation technique to conventional solvent extraction as it eliminates the use of toxic solvents, reduces separation cost, and simplifies the separation process. PIM is the new generation of a liquid membrane made by casting solution containing liquid phases (extractant and plasticizer/modifier) and base polymers. Despite its better performance and stability in comparison to the previous types of liquid membranes, PIM's robustness for applications on an industrial scale is still considered insufficient mainly due to its limited stability in the long-term separation process. In recent years, different approaches have been devoted to improving the stability of PIM while maintaining its performance. This review aims to summarize and evaluate the current literature on the improvement of the performance of PIMs with particular focus on the use of alternative base polymers, including non-conventional linear homopolymers, copolymers, or cross-linking polymers. Furthermore, more emphasis is given to the composition, fabrication process, and application of the PIMs. Finally, the performance of the PIMs with the alternative base polymers in terms of extraction rate and long-term stability is presented and compared to the PIMs fabricated using their corresponding common base polymers.
SINTESIS SENYAWA METIL 9,10-EPOKSI STEARAT DARI MINYAK JARAK PAGAR (Jatrophacurcas ) ASAL PULAU TIMOR Febri Odel Nitbani; David Tambaru; Imanuel Gauru; Ardila Kusumawati
Jurnal Sains dan Terapan Kimia Vol 9, No 1 (2015)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.199 KB) | DOI: 10.20527/jstk.v9i1.2146

Abstract

Telah dilakukan penelitian untuk mensintesis senyawa metil 9,10-epoksi stearat dari minyak jarak pagar (Jatropha curcas) asal Pulau Timor. Minyak jarak pagar dapat diekstrak dari biji jatropha menggunakan pelarut petroleum eter dengan rendemen 80,21% (b/b). Hasil transesterifikasi minyak jarak pagar dengan katalis basa Na- metoksida adalah metil linoleat (39,94%) dan metil oleat (33,52%). Epoksida hasil transesterifikasi minyak jarak pagar menggunakan pengoksidasi asam m-kloroperoksibenzoat menghasilkan campuran bentuk cis dan trans dari senyawa metil 9,10-epoksi stearat dengan masing-masing kemurnian 11,57% dan 21,13%. Kata Kunci: minyak jarak pagar, metiloleat, epoksidasi 
Simple Microfluidic Paper-Based Analytical Device (μ-PAD) Coupled with Smartphone for Mn(II) Detection Using Tannin as a Green Reagent Fidelis Nitti; Wendelina Archangela Ati; Philiphi de Rozari; Pius Dore Ola; David Tambaru; Luther Kadang
Indonesian Journal of Chemistry Vol 23, No 4 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.82511

Abstract

The development of a simple yet greener microfluidic paper-based analytical device (μ-PAD) for on-site detection of Mn(II) in various types of waters using tannin as a natural reagent was described. The μ-PAD consists of twelve detection zones, created on a Whatman Number 1 filter paper by a simple drawing technique using an acrylic watercolor. The detection of Mn(II) was based on the color change on the reaction zone due to the reaction between Mn(II) and the pre-deposited tannin. The μ-PAD image was captured by a portable smartphone detector, and the blue intensity was digitized using a color picker application to generate the reflectance as the analytical response. The proposed method was characterized by a linear dynamic range of 0.05–0.25 mg L−1 with the limit of detection (LOD) for the determination of Mn(II) of 0.026 mg L−1. The other analytical merits of the proposed method, such as precision (RSD, 1.107%), accuracy (E, 6.697%), and recovery (104–112%), were all comparable to the existing spectrophotometric methods. The method’s successful application to natural water samples from manganese mining sites aligns with the reference spectrophotometric method, indicating its good selectivity and accuracy without significant influence of commonly associated interfering ions.
Surface Modification of Paper-Based Analytical Devices Using Polymer Inclusion Films as Optical Sensors for The Detection of Cu(II) Ions in Water Ajung, Oktaviani; Tambaru, David; Lapailaka, Titus; Kadang, Luther; Nitti, Fidelis
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.24436

Abstract

This study presents the development of a microfluidic paper-based analytical device (µPAD) modified with a polymer inclusion film (PIF) for the detection of Cu(II) ions in aqueous samples. The PIF formulation comprised of polyvinyl chloride (PVC), bis(2-ethylhexyl)phosphoric acid (D2EHPA), and Aliquat-336, while sodium zincon salt served as the colorimetric reagent. The optimization was conducted by systematically varying several key parameters such as PIF composition and volume, reaction time, sample volume, and sample pH. The resulting color intensity was digitally quantified using smartphone, and the results were validated against UV–Vis spectrophotometry as the reference method. The optimized conditions were established at a composition of 50% PVC, 30% D2EHPA, 20% Aliquat-336 and 0.1% zincon, with a PIF volume of 20 µL, a reaction time of 40 minutes, a sample volume of 30 µL, and an optimal pH of 5. Under these conditions, the µPAD demonstrated excellent analytical performance, exhibiting strong linearity (R² = 0.9993), high precision (0.36%), good accuracy (0.368%), recovery rates between 98.18% and 102.44%, a limit of detection (LOD) of 0.143 mg/L, and a limit of quantification (LOQ) of 0.476 mg/L. Furthermore, selectivity assessments indicated that D2EHPA effectively reduced interference from Zn(II) ions, confirming the robustness of the developed sensing platform.
PENURUNAN KADAR LOGAM KADMIUM PADA UDANG (Peanaeus merguiensis) DENGAN PERENDAMAN CUKA NIRA ENAU (Arenga pinnata) Manu, Rolin M. P.; Tambaru, David; da Cunha, Theo
Chemistry Notes Vol 1 No 1 (2018): Chem. Notes 2018, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1570

Abstract

A research on the decrease of cadmium (Cd) content in shrimps by soaking them in palm (Arenga Pinnata) vinegar has been done. This study aimed to determine the removal percentage (%) of cadmium from shrimp after immersed in palm (Arenga Pinnata) vinegar and to determine the concentration and immersion time optimum in reducing the cadmium metal content in shrimps. The research was conducted in several steps namely sample preparation, determination of optimum concentration of vinegar, simulation of shrimp pollution, sample soaking in palm (Arenga Pinnata) vinegar and determination of cadmium content in samples. A two-way ANOVA test (α = 0,05) showed that the variation of palm (Arenga Pinnata) vinegar concentration has significant effect on reducing Cd content, while contact times have no significant effect on the reduction of Cd content in shrimps. It was found that the optimum concentration of palm (Arenga Pinnata) vinegar was 2% and optimum immersion time was 30 minutes. The removal percentage (%) of cadmium content from shrimps using palm vinegar reached 98.84%.
Co-Authors Ajung, Oktaviani Ardila Kusumawati Bosirul Hoque Da Cunha, Theo Fidelis Nitti Imanuel Gauru Lapailaka, Titus Luther Kadang Manu, Rolin M. P. Muhammad Cholid Djunaidi Odi Theofilus Edison Selan Philiphi de Rozari Pius Dore Ola Wendelina Archangela Ati