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INDONESIA
JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Published by Universitas Sari Mutiara Indonesia
ISSN : ""     EISSN : 26153378     DOI : https://doi.org/10.51544/kimia.v6i1
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Materials Science & Nanotechnology
Focus on results study and literature review in the scope of chemistry education and chemistry sciences in the world. Scope: Chemistry Education Analytical chemistry, including new techniques and instrumentation Biochemistry and medicinal chemistry Inorganic chemistry, including main group, transition metal, and f-block compounds, as well as coordination, organometallic, and solid-state chemistry Materials chemistry of hard and soft matter, from the nanoscale upwards Nuclear chemistry and radioactivity Organic chemistry, including synthesis, characterization, and properties of organic compounds, as well as a study of organic reactions and their mechanisms Physical chemistry and chemical physics Sustainable, green, and environmental chemistry Theoretical and computational chemistry
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 131 Documents
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ANALISA KADAR BESI (Fe) DALAM AIR DI DEPOT AIR MINUM ISI ULANG YANG BERADA DI KELURAHAN DWIKORA KECAMATAN MEDAN HELVETIA KOTA MEDAN TAHUN 2021 Megawati Zendrato; Dyna Grace Romatuan Aruan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Water is a very vital element for human life on this earth. In the human body about 50 -80% consists of water. The high demand for drinking water, especially in urban areas, has encouraged the emergence of bottled water product industries and the production of refilled drinking water depots. Re-drinking water is one type of drinking water that can be drunk directly without cooking it because it goes through certain processing processes such as drinking water that is safe for health, it must go through the physical, microbiological, chemical and radioactive requirements contained in it. mandatory and additional parameters. The purpose of this study was to determine whether the level of iron (Fe) in refill drinking water in Dwikora Village, Medan Helvetia District, Medan City was in accordance with what had been determined by the Minister of Health of the Republic of Indonesia. through Permenkes No. 492/Menkes/Per/IV/2010 concerning Drinking Water Quality Requirements. This research is descriptive and uses atomi c absorption spectrophotometer (AAS). Based on the results obtained from 10 samples of refill drinking water, it was shown that there were 2 samples (20%) of Fe content that did not meet the drinking water quality requirements obtained from depots E and F of 0.59 mg/l. and 0 respectively. 0.35 mg/l and 8 samples (80%) were obtained from the depot A = 0.22 mg/L, B = 0.10 mg/L, C = 0.28 mg/L, D = 0.19 mg/L L, G= 0.27 mg/L, H= 0.23 mg/L, I = 0.19 mg/L, J= 0.17 mg/L these levels stillmeet the drinking water quality requirements. The maximum limit for Fe levels in Drinking Water Quality Requirements As regulated in the Regulation of the Minister of Health No.492/Menkes/Per/IV/2010 is 0.3 mg/L.
PENETAPAN KADAR FLAVONOID EKSTRAK RAMBUT JAGUNG MENGGUNAKAN METODE SPEKTROFOTOMETRI UV-VIS Gimelliya Saragih; A Zukhruf Akbari; M Zaim Akbari; Irfan Syahputra
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Indonesia is an agricultural country with extraordinary natural wealth. Indonesia is also the 6th country with the largest corn production in the world. In the city of Medan, there are many corn sellers who do not pay attention to waste from corn such as corn husks and hairs. Corn silk as one part of corn that is not used properly. Hair is just a waste that pollutes the environment. This study aims to analyze the content of corn silk so that it can be applied according to the content contained in corn silk. Corn silk was extracted using the ultrasonication method and 70% ethanol solvent for 1 hour and the thick extract was obtained using a rotary evaporator, then a phytochemical screening test was carried out to determine what secondary metabolites were contained in corn silk using UV-Vis spectrophotometry at a wavelength of 200 -400 nm The results of the phytochemical screening test showed that corn silk contained alkaloids and flavonoids. UV-VIis spectrophotometry using a standard solution of quercetin. The flavonoid content in the corn silk extract sample was 2.99%.
PENGARUH PROSES PENGUKUSAN PADA DAUN UBI JALAR VARIETAS UNGU (Ipomoea batatas L.) TERHADAP KADAR B-KAROTEN DENGAN METODE SPEKTROFOTOMETRI UV-Vis Desi Sri Rejeki; Agung Nur Cahyanta; Isna Azzah Arfiyani
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

B-carotene is a very potential source of vitamin A and has the highest vitamin A activity of all known carotenoids. B-carotene in purple sweet potato varieties fulfils the needs of vitamin A and works as an antioxidant in reducing the effects of free radicals. The research aimed to determine the levels of B-carotene in fresh, and steamed purple sweet potato varieties by spectrophotometry UV-Vis. The extraction used liquid maceration method with n-hexane, acetone, and ethanol as a solvent with ratio 2:1:1. The method used for qualitative analysis was TLC with eluents n-hexane: acetone: ethanol by comparison 1:1:2 by silica gel plate as stationary phase. The qualitative analysis results showed that the value of Rf in fresh purple sweet potato leaves were 0.81 and steamed purple sweet potato leaves were 0.83. The maximum B-carotene wavelength was 450.5nm. The quantitative analysis results stated linear regression equation y=-8+1.27x and the correlation coefficient of 0.997. B-carotene levels of fresh and steamed purple sweet potato leaves were respectively 6.4036 yg/gram and 6.3721 yg/gram. The levels obtained were analysed by Independent Sample T Test with a significance level of 95%. The Independent Sample T Test results showed that there was an effect on the process of boiling and steaming on B-carotene level in purple sweet potato leaves. In conclusion, the B-carotene level of sweet potato leaves in the steaming process was better than boiling process.
UJI KETAHANAN LUNTUR WARNA PADA KAIN DENGAN PEWARNA DARI EKSTRAK UBI UNGU Ery Fatarina Purwaningtyas; Ahmad Shobib; Noormi Handayani
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

One of the cheap and widely available sources of anthocyanins in Indonesia is purple sweet potatoes because purple sweet potatoes contain anthocyanins that are greater than sweet potatoes with other varieties. This research conducted anthocyanin extract from purple sweet potato using technical extract tables using solvent methanol. The coloring process is carried out from pre-mordant without mordant. The compound used is alum. In the process of dyeing the cloth in the anthocyanin extract, the soaking time was varied, namely 12, 18, 24 and 30 hours. Furthermore, it was tested for color fastness against washing, staining, wet rubbing and dry rubbing.From the results of the study, the average anthocyanin content of purple sweet potato was 174.085 mg/100 g of dry matter.The results of the application of dye from sweet potato extract showed thatthe immersion time, pre-mordanting treatment and without mordant had no effect on the results of the color fastness test against washing, staining and dry rubbing. The results of the color fastness test to washing at 40°C gave a value of 1-2 or "not good", the results of the fastness test to staining and dry rubbing gave a value of 4-5 or "good".Pre-mordanting and without mordant affect the color produced, namely for pre-mordanting purple fabrics and pink fabrics without mordant.
ANALISIS EKSPERIMENTAL CAMPURAN BAHAN BAKAR SOLAR DAN HASIL REAKSI ALKOHOLISIS BIODIESEL DARI PALM FATTY ACID DISTILLATE SEBAGAI BAHAN BAKAR MESIN DIESEL PADA TAMBAK UDANG Ahmad Jibril; Faizin Adi Nugroho
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Currently, condition of the availability of energy sources derived from fossil fuels which is decreasing and increasing air pollution caused by emissions resulting from the combustion of fossil fuels, then it is time to diversify energy by developing new and renewable energy environmentally friendly by utilizing sources of raw materials derived from vegetable oils, one of them is biodiesel. Biodiesel is produced through an alcoholics’ reaction process between vegetable oil and methanol with the help of an acid or base catalyst. Furthermore, the biodiesel that has been produced is then mixed with diesel fuel in a certain ratio to be used as fuel in diesel engines. Based on the results of the experimental reaction of biodiesel alcoholics with a variable concentration of catalyst against the weight of feed palm fatty acid distillate, the optimum methyl ester result was obtained at 98.65% and the results of the analysis of the alcoholics reaction of biodiesel with the variable ratio of reagents between the weight of methanol to the weight of feed palm fatty acid distillate obtained the optimum methyl ester result at 98.33%.
PERBANDINGAN PENENTUAN KADAR PROKSIMAT DALAM BATUBARA MENGGUNAKAN METODE GRAVIMETRI KONVENSIONAL DAN THERMOGRAVIMETRIC ANALYSIS Muhammad Robiansyah; Subur P. Pasaribu; Aman Sentosa Panggabean
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Research on the comparison of the determination of proximate levels in coal using conventional gravimetric methods and Thermogravimetric Analysis (TGA) through comparative tests has been carried out. This study aims to determine the comparison of the average analysis results using the t-test, the precision level of analysis results of each method using CV Horwitz, and the comparison of the precision level of the analysis results using the F test. Based on the results of the t-test showed a significant difference in the average analysis results between the two methods for all parameters. In the test using CV Horwitz for parameters of inherent moisture, volatile matter and fixed carbon using both methods and also ash content using the conventional gravimetric method was declared to meet the precision requirements, but for the ash content parameter using TGA instruments was stated otherwise. The F test for parameters of ash content and inherent moisture showed a significant difference in the precision level of the analysis results between the two methods, but for the parameters of volatile matter and fixed carbon was stated otherwise.
PENGARUH LAMA FERMENTASI DENGAN MENGGUNAKAN AERASI TERHADAP RENDEMEN MINYAK NILAM (PATCHOULI OIL) Putri Rizky; Rika Silvany
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Patchouli (Pogostemon cablin Benth) is a tropical plant that produces a type of essential oil of the same name (pattern oil) which plays an important role in the world of flavor and fragrance, especially for the perfume and aromatherapy industry. This study aims to determine the fermentation time on the quality of patchouli oil using Indigenous Rhizosphere molds. This experiment was carried out by fermenting dried patchouli using Indigenous Rhizosphere mold for 12, 15, 18 and 21 hours and then distilled. The results showed that the best duration of fermentation in producing patchouli oil was 18 hours of fermentation with a yield of 2.89% and the quality of patchouli oil met the SNI standards, namely Specific Gravity 0.9609, Refractive Index 1.5039, Acid Number 0,601.
MODIFIKASI STRUKTUR ZAT WARNA KUINOLIN UNTUK MENINGKATKAN KINERJA SEL SURYA MENGGUNAKAN METODE DFT Elvira Deswita; Imelda Imelda; Rifky Farhan; Oesamah Oesamah
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

In this study, Quinoline-based D-H-A organic dye was used which consisted of 4 dyes with various donor chains of aniline (Q1), indoline (Q2), phenol (Q3) and coumarin (Q4). The calculation method used is the DFT/TD-DFT (Density Functional Theory/Time Dependent-DFT) method with a B3LYP / 6-31G basis set. The aim of this study was to determine the modification of the quinoline-based D-H-A dye with variations of the donor chains are efficient as a sensitizer on DSSC. Analysis based on the parameters of the bandgap, wavelength absorption, excitation energy, G-inject, G-reg, oscillator strength, dihedral angle, bond length, dipole moment, LHE and Voc. The result of the study show O2 with the name 6-(indolin-5-yl) quinoline-2-carboxylic acid is the best dye with a bandgap is 2,6204 eV, absorption wavelength is 566,80 nm, excitation energy is 2,1875 eV, G-inject is -3,114 eV, G-reg 0,1239 eV. Therefore, it can be concluded that the modification of quinoline dye to D-H-A type can improve the performance of DSSC.
POTENSI MINYAK ATSIRI DARI DAUN TUMBUHAN SAMBUANG (Etlingera elatior) SEBAGAI SENYAWA ANTIBAKTERI DAN ANTIOKSIDAN M. Fadly; Suryati Suryati; Farid Al-Huzaini; Nadila Arrahim
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Sambuang (Etlingera elatior) is a member of the Zingiberaceae family which is widely distributed in Indonesia. Traditionally, sambuang is used for cooking spices and to cure various diseases, namely diseases of the ears, stomach, skin wounds, and stomach pain due to poisoning. In this study, essential oils were isolated from sambuang leaves and antibacterial and antioxidant activities were also determined. Isolation of essential oil was carried out by steam distillation and the chemical content of the isolated essential oil was analyzed by Gas Chromatography-Mass Spectrometry (GC-MS). It is known to contain 98 chemical compounds, with the main ingredients being a-Pinene (19.39%), Gadoleyl Alcohol (7.37), Myristoleyl Alcohol (7.16%), Palmitoleyl Alcohol (5.87%), Sabinene (5 ,48%). The results of the antibacterial activity of essential oils using the disc diffusion method showed strong activity against Escherichia coli, Salmonella typhi (50% concentration) and Staphylococcus aureus (70% concentration) with inhibition zones of 13.6 mm, 12 mm, respectively. and 11 mm. The results of the antioxidant activity test using the DPPH method (1,1-diphenyl-2-picrylhydrazyl) showed that the essential oil of sambuang leaf essential oil was not effective as an antioxidant because it was very weak with an IC50 value of 6939.18 g/mL.
ANALISIS MUTU BIODIESEL DAN RANCANGAN PERBAIKAN DI PT X DENGAN PENETAPAN KADAR TRIGLISERIDA SEBAGAI STANDAR Masdania Zurairah; Ansari Ansari; Joko Suprianto
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Research has been carried out at PT X in managing palm oil into biodiesel products. To get biodiesel from palm oil, it undergoes processes such as purification, transesterification and then methyl ester or biodiesel is produced. The biodiesel produced is a reaction between triglycerides (vegetable oil) and the chemical compound methanol with a catalyst. The company sets the standard for biodiesel to have a maximum triglyceride content of 0.2%. The production data turned out to show triglyceride levels above 0.2% with a very large number of outspec products so this indicates a problematic production system. Loss of quality or Quality Loss Function, this is due to damage in the manufacturing process stage, which will suffer losses, in the form of material, time, energy. At this stage the methanol used per hour is 4783 kg/hour and the catalyst is 773 kg/hour. This data is obtained from the total use of vegetable oil materials in 1 hour which is 46 tons/hour.

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