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All Journal Chimica et Natura Acta Indonesian Journal of Chemistry Jurnal Fisika : Fisika Sains dan Aplikasinya Jurna Beta Kimia Chemistry Notes
Lapailaka, Titus
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics

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Journal : Chemistry Notes

 1 
SYNTHESIS AND CHARACTERIZATION OF CHITOSAN-MAGNESIUM (II) COMPLEX IONS FROM SHRIMP SHELLS BILAUT, IDALIA; Gauru, Imanuel; Wogo, Hermania Em; Lapailaka, Titus
Chemistry Notes Vol 1 No 1 (2019): Chem. Notes 2019, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1574

Abstract

Research has been carried out on the synthesis and characterization of Mg - Chitosan complex ions from shrimp shells using crosslink method. Chitosan isolation was made in four stages, namely deproteination, demineralization, depigmentation and deacetylation. The maximum degree of deacetylation (DD) of chitosan is 89%. Based on XRD and FTIR data, chitosan obtained is in the form of amorphous and there are typical wave number of chitosan, namely 3444.91 cm-1 and 1658.4 cm-1 associated to O-H, N-H dan C=O.
EKSTRAK AIR BIJI PINANG (Areca Catechu L.) SEBAGAI PENGOMPLEKS UNTUK ANALISIS Fe (III) MENGGUNAKAN METODE PENCITRAAN DIGITAL Ola, Pius D.; baun, Duwita N.; Lapailaka, Titus
Chemistry Notes Vol 6 No 2 (2024): Chem. Notes, 6(2), 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.9409

Abstract

A Research has been carried out on the utilization of areca seed aqueous extract as a complex for the analysis of iron(III) in aqueous media using digital imaging methods. In this study, the content of secondary metabolites in aqueous extract of areca nut was first determined, then an evaluation of performance parameters was carried out by analyzing iron(III) with aqueous extract of areca nut as the complexing agent, which was preceded by determining some of the optimum conditions for the formation of a complex between aqueous extract of areca nut–Fe (III). Areca seed water extract was then determined as an alternative reagent to determine the concentration of Fe(III) in real water samples using digital imaging by comparing this reagent with the standard KSCN reagent as the complexing agent. The results obtained showed that the correlation coefficient of areca seed water extract as complexing was 0.9741, which means that this method or reagent can be used as complexing agent for Fe(III) analysis in water. By comparing the extract and KSCN as a complex, it was found that the precision and accuracy of the two reagents were not significantly different in terms of precision but significantly different in terms of accuracy. When the areca seed water extract was applied to analyze Fe(III) in PDAM water and well water, % recovery was is still low and does not meet the % recovery requirements. This low recovery result indicates the amount of interfering substances in the water sample.
ANALISIS LAJU KOROSI PADA PLAT BESI MENGGUNAKAN EKSTRAK DAUN GAMAL (Gliricidia sepium) SEBAGAI INHIBITOR ALAMI DALAM MEDIA HCl 3% DAN H2O Lapailaka, Titus; Anul, Olimpia Y.
Chemistry Notes Vol 4 No 2 (2022): Chem. Notes 2022, 4 (2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.10542

Abstract

Improving the corrosion resistance of iron in acidic environments is an important consideration in industry. This research was conducted to analyze the corrosion inhibition of iron using ethanolic extract of gamal leaf (Gliricidia sepium) as a natural inhibitor in 3% HCl and H2O media. The aim was to determine the effect of inhibitor concentration on the corrosion rate of iron plate immersed in corrosive media of 3% HCl and H2O and to determine the effect of immersion time on the efficiency of ethanolic extract of gamal leaf on the corrosion rate of iron plate in corrosive media of 3% HCl and H2O. The results indicated that the higher the concentration of ethanolic extract of gamal leaf, the lower the corrosion rate. The highest concentration of ethanolic extract of gamal leaf used was 10%, with the corrosion rate values of 0.0044 cm/year in 3% HCl media and 0.0051 cm/year in H2O media. It is observed that tanin compound in ethanolic extract of gamal leaf showed potential as an iron corrosion inhibitor in 3% HCl and H2O media with efficiencies of 91.46% and 88.19%, respectively.
PENETAPAN KADAR TANIN DAN UJI KEMAMPUAN EKSTRAK DAUN GAMAL (Gliricidia sepium) SEBAGAI INHIBITOR KOROSI LOGAM TEMBAGA (Cu) Lapailaka, Titus; Edamuli, Tri O. N.; Kadang, Luther
Chemistry Notes Vol 5 No 1 (2023): Chem Notes 2023, 5(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v5i1.11853

Abstract

A study has been carried out to determine the levels of tannins and the effectiveness of Gamal leaf extract (Gliricidia sepium) as a corrosion inhibitor for copper (Cu). The objectives of this research were to determine the tannin content in gamal leaf extract, observe the corrosion rate of copper with varying concentrations of the extract, identify the optimal soaking time, and evaluate the inhibitory properties of gamal leaf extract on copper corrosion. Gamal leaf extract was obtained through maceration and confirmed to contain tannins using phytochemical tests. The corrosion rate and inhibition efficiency were measured using the weight loss method. The results indicated that the gamal leaf extract contained 40.42% tannins. A concentration of 10% of gamal leaf extract reduced the corrosion rate of copper in a NaCl solution, demonstrating the highest inhibition efficiency at 80.16%. It was observed that increasing the concentration of the inhibitor and prolonging the immersion time led to lower corrosion rates. In the case of a NaCl solution as the corrosion medium, the highest concentration of gamal leaf extract used was 10%, and the longest immersion time was 9 days, resulting in a corrosion rate of 0.0593 cm/year.
Co-Authors Agnes Simamora Ajung, Oktaviani Antonius R.B. Ola Anul, Olimpia Y. baun, Duwita N. BILAUT, IDALIA Chong Dat Pham David Tambaru Edamuli, Tri O. N. Fidelis Nitti Gauru, Imanuel Hermania Em Wogo Julinda Bendalina Dengga Henuk Kadang, Luther Kapitan, Origenes Boy Lince Mukkun Luther Kadang Masruroh Masruroh Masruroh MASRUROH Modhe, Katarina Naat, Johnson N. Ola, Pius D. Peter Proksch Pingak, Redi Kristian Rachmat Triandi Tjahjanto Rensini, William Antoni Sherlly Ledoh