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Chemistry Notes
Published by Universitas Nusa Cendana
ISSN : 26221071     EISSN : -     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science
This journal publishes reserach(es) in the field organic, inorganic, biochemistry, physical and analytical chemistry, applied chemistry including materials, medicines and agricaltural based chemistry applications and educational chemistry. This bilingual journal (in English or in Bahasa Indonesia) is issued in 2 (two) volumes (July and December) every year.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 58 Documents
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Analisis Kualitas Air Desa Nulle Kecamatan Amanuban Barat Kabupaten Timor Tengah Selatan Mawar, Yuliana Pelewa; Kadang, Luther; de Rozari, Philiphi
Chemistry Notes Vol 4 No (1) (2022): Chem. Notes 2022, 4 (1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i(1).7744

Abstract

Water is one of the most important human needs, there for the availability and of water has to be protected from pollution. The purpose of the study was to determine the quality of the Spring based on physical, chemical and biological parameters in the Tailete, Netbesi and Oenise springs in Tublopo village, West Amanuban district, South Central Timor regency. The research sampling method followed the meet developed on Indonesian National Standard (SNI) and determination of water quality status was based on the storet method accords to the Decree of the Minister of the Environment No. 115 of 2003. The results should physical and chemical parameters in the Tailete, Netbesi and Oenise springs indicate that meet the water quality standards based on the Minister of Health regulation No. 32 of 2017. However, did was not meet Water quality standards detergent and microbiological parameters, coliform in the Tailete and Oenise springs. The quality status of the Tailete and Oenise springs in was clasis moderately polluted with a score of -25. Meanwhile, class A Netbesi springs are classified as meeting water quality standards with a score of 0.
Sintesis Turunan Diarilpentanoid dari Sinamaldehida Lerrick, Reinner Ishaq; Sanit, Karolina T.; Gauru, Imanuel
Chemistry Notes Vol 4 No (1) (2022): Chem. Notes 2022, 4 (1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i(1).8134

Abstract

Synthesis of 1,5-Diphenylpenta-2,4-dien-1-one from local cinnamaldehyde has been done. Through aldol condensation reaction submission of local cinnamaldehyde with acetophenone in the presence of KOH resulted in 57% yellow oil confirmed as the desired product by GMMS analysis.
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 Kualitas Air pada Sumber Mata Air Di Desa Baumata Kecamatan Taebenu Kabupaten Kupang Kadang, Luther; Nua, Maria F.; Lulan, Theodore Y. Y. K.
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.v4i2.9510

Abstract

Water quality is the nature of water and the content of living this, substances, energy, or other components in water as seen from physical, chemical, and biological characteristics. Pollution of the water environment often occurs, there by reducing water quality. The purpose of this study was to determine the quality and status of contamination of springs based on physical, chemical, and biological parameters in Baumata Village, Taebenu District, Kupang Regency based on the storet method. Determination of the location of water sampling is determined by the purposive sampling technique, while the water sampling refers to the Indonesian National Standard (SNI). Water quality measurements where carried out in situ and ex situ. Parameters tested in situ were temperature, tds, pH, odor and taste, while ex situ were hardness, detergent, and total coliform. The data from the analysis were compared with the quality standars according to Permenkes No. 32 of 2017. The results of the research on spring were reviewed from the parameters of temperature, tds, odor, taste, pH, hardness, and detergent showed that each value was still within safe limits except for parameters total coliform because it exceeds the required quality standars. The status of water contamination in springs based on the STORET method is lightly polluted.
Penurunan Kadar Kekeruhan, BOD, dan COD Pada Limbah Laundry Menggunakan Biosorben Arang Eceng Gondok (Eichhornia crassipes) Ngana, Mersi N.; Suwari, Suwari; Ola, Pius D.
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.v4i2.9532

Abstract

Abstract Research has been carried out with the title of reducing turbidity, BOD, and COD levels in laundry waste using water hyacinth charcoal biosorbent which aims to determine the surface area of water hyacinth charcoal biosorbent on reducing turbidity, BOD, and COD in laundry waste using water hyacinth charcoal biosorbent, knowing the effect of water hyacinth charcoal biosorbent contact time on decreasing turbidity, BOD, and COD in laundry waste, and knowing the effect of water hyacinth charcoal biosorbent on decreasing turbidity, BOD, and COD in laundry waste. The adsorbent used was water hyacinth (Eichhornia crassipes). Water hyacinth adsorbents is a plant used as a cleaning agent in waters polluted by heavy metals, reducing the movement of organic waste so asto to facilitate sedimention. The water hyacinth charcoal adsorbent functions as an adsorbent, where the adsorbents functions to control wastewater pollution. The adsorption used was water hyacinth (Eichhornia crassipes). Water hyacinth adsorbents in reducing turbidity, BOD, and COD are surface area, time variation and adsorbents mass. Final results the highest level of water hyacinth adsorbent surface area of 44.0754 m2 /g occurred at a contact time of 60 minutes. The final results of water hyacinth adsorbent contact time between laundry waste, the hihghest decrease in turbidity level of 47.52 % occurred in 30 minutes, the highest decrease in BOD contect of 80.04 % occurred in contact time of 60 minutes, and the highest decrease in COD was 38.70 % occurred at a contact time of 120 minutes. The final results of the water hyacinth adsorbent mass between laundry wastes, the highest decrease in turbidity content of 47.27 % occurred in 3 gram mass, the highest decrease in BOD contect was 80.04 % occurred in 6 gram mass, and the highest decrease in COD content was 37.02 % occurs at a mass of 12 gram.
Ekstraksi Gliserin Dari Biodiesel Menggunakan Deep Eutectic Solvent Berbasis Asam Tanat-Cholin Chloride Sebagai Ekstraktan Ola, Pius D.; Kusuma, Albert W.; Nitbani, Febri O.; Ola, Antonius R. B.
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.v4i2.9650

Abstract

Biodiesel is a concern for many parties because it is environmentally friendly, non-toxic, and renewable. One of the problems faced in the use of biodiesel as an alternative energy is the process of purification from impurities and by-products such as glycerin which is complicated and expensive. Glycerin can cause saponification, increase ignition delay, incomplete combustion, blockage and increase engine maintenance costs. In this study, deep eutectic solvents (DES) synthesized from choline chloride (ChCl) salts and tannic acid were used as extractants for the extraction of glycerin from biodiesel synthesized through palm oil transesterification with methanol as a trans substituent and KOH as a catalyst. The effect of the composition of the constituent moles of DES and the ratio of biodiesel-DES mass to glycerin content of biodiesel has been studied. The results showed that the higher the content of ChCl salt in DES and the greater the ratio of biodiesel-DES, the lower the glycerin content in biodiesel, with the highest decrease of 65.7693% (glycerin content after extraction of 2.0193%) obtained from the composition of the mole DES 1:47 (Tannic acid:ChCl) and the mass ratio of biodiesel-DES 1:3. The biodiesel produced has not met SNI 1782, which is 0.02%.
Penurunan Kadar TSS Dan COD Limbah Cair Rumah Pemotongan Hewan Menggunakan Elektrolisis Ledoh, Sherlly M. F.; Dasul, Aprilia R. T.; Ola, Pius D.; Ola, Antonius R. B.
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.v4i2.9652

Abstract

Research has been carried out on Reducing COD and TSS Levels of Slaughterhouse Liquid Waste Using the Electrolysis Method. This study aims to analyze the effect of electrolysis time and voltage (voltage) on the reduction of COD and TSS levels of RPH waste water using the electrolysis method. Electrolysis is the decomposition of electrolytes by direct electric current using two kinds of electrodes as conductors of electric current. The results showed that the longer the electrolysis time and the greater the voltage, the percentage of reduction in COD and TSS levels increased. The percentage reduction obtained was 31.43% COD and 95% TSS at 120 minutes of electrolysis time and 12 volts of voltage.
Analisis Konsentrasi Total Suspended Particulate (TSP) Udara Ambien Dan Proyeksi Risiko Kesehatan Di Kota Kupang Sambur, Ma'aki M. D.; Suwari, Suwari N.; Nitti, Fidelis
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.v4i2.9655

Abstract

This study aims to determine the concentration of Total Suspended Particulate (TSP) in Kupang City and analyze public health risks. The sampling method used is the High Volume Air Sampler (HVAS) according to SNI 7119-3-2017. XRF analysis was carried out to determine the elements in the particulates. The results of the analysis showed that the highest concentration of TSP was 175.768 μg/m3. The highest intake value is 0.0206 mg/kg/day, the highest RQ value is 0.008. The elements detected were Si, K, Ca, Ti, Fe, Ni, Cu, Zn, Sr, Ba, Ce, Eu, and Yb. The results of the analysis show the concentration of TSP based on PP RI quality standards No. 22 of 2021 is still within safe limits, so there is no risk to public health in Kupang City.
Analisis Penurunan Kadar TSS, COD Dan BOD Pada Limbah Cair RSUD Mgr. Gabriel Manek, SVD Atambua Nusa Tenggara Timur Dengan Metode Elektrolisis Ledoh, Sherlly M. F.; Bere, Dau D.; Darmakusuma, Dodi D.; Lerrick, Reinner Ishaq
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.v4i2.9658

Abstract

A research on waste water treatment using electrolysis has been carried out. The purpose of this study was to determine the optimum condition of electric voltage or time in reducing the Total Suspended Solid (TSS), Chemical Oxygen Demand (COD) and Biochemical Oxygent Demand (BOD) of Mgr. Gabriel Manek, SVD hospitall’s waste effluent. The method used in this study was carbon-carbon electrolysis method. The results showed decreasing of TSS levels from 2880 mg/L to 40 mg/L with % removal of 98.61%, COD levels from 8,240 mg/L to 2,883 mg/L with % removal of 65.34% and BOD levels of 520 mg/L to 40 mg/L with a % removal of 92.30%.
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.

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