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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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PEMBUATAN KOMPOSIT INTERPENETRASI JARINGAN POLIMER ANTARA POLIURETAN-KARET ALAM SIR-10 DENGAN PENAMBAHAN MONTMORILLONIT SEBAGAI BAHAN PENGISI Supran Hidayat Sihotang; Wilda Wahyuni Siregar; Dwi Handayani
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 2 (2019): Volume 3 Nomor 2 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

The using of polyurethane (PU) that was added simultaneously with SIR-10 natural rubber (NR) as a synthesis of interpenetrating polymer network (IPN) which was then added montmorillonit (MMT) as filler material in the composite forming process IPN. Polypropylene glycol and toluene are diisocyanate with a comparison of the number of moles between NCO: OH = 2:1, which was used to synthesize a derived from PU. In advance stearic acid, zinc oxide, MBTS, and sulfur are added as a revulzation of NR. PU and NR vulcanization combined to produce IPN NR-PU by using temperature of 140 oC. The addition of MMT in the IPN NR-PU will generate the IPN NR-PU-MMT composite. Furthermore, the IPN NR-PU-MMT composite was characterised with tensile strength test, water absorption test, SEM and DSC. The results of this research showed that the composite mixture of IPN increased with the increase of MMT to the optimum limit in comparison between NR-PU and MMT was 74 phr: 26 phr was a mixture that produced good tensile strength and properties of ductility are good. The mechanical, physical, and morphological properties of the IPN are influenced by the number of MMT that was used to produce components that cross each other in the bonding interface.
ISOLASI DAN ANALISIS KOMPONEN MINYAK ATSIRI SEREH WANGI (Cymbopogon Nardus L.rendle) MELALUI EXTRAKSI SOXHLETASI MENGGUNAKAN GAS CHROMATOGRAPHY MASS SPECTROMETRY Erdiana Gultom; Hestina .; Salomo Sijabat
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 4 No 1 (2020): Volume 4 Nomor 1 Tahun 2020
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Sereh wangi (Cymbopon nardus L. Rendle) is a plant that is spread throughout Indonesia.. Apart from being used as spices or cooking spices, this plant can be processed into more valuable by isolating the essential oils found in this plant. Isolation of essential oil from citronella plants (Cymbopon nardus L. Rendle) by soxhletation extraction method was successful. From 1000 grams of fresh fragrant lemongrass, dried, then reduced and blended to 100-120 mesh size. Of these samples used as much as 100 grams to be extracted. With the extraction process for 90 minutes using hexane as a solvent, the essential oil yield was 1.8 ml. The extracted essential oil was analyzed by Gas Chromatography Mass Spectrometry (GC-MS). From the results of GC analysis, 25 peaks were obtained in the form of chromatogram, while the spectra produced by the MS data analyzed were 10 peaks. Three of the ten highest percentages of compounds from the GC-MS data are citronellal (36.94%), octadienal (8.88%) and geranil acetate (5.75%).
ANALISIS LOGAM TIMBAL (Pb) DAN TEMBAGA (Cu) PADA KOPI BUBUK TIDAK BERMEREK YANG BEREDAR DI PASAR TRADISIONAL DENGAN METODE SPEKTROFOTOMETRI Erdiana Gultom; Hestina .; Salomo Sijabat
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 4 No 2 (2020): Volume 4 Nomor 2 Tahun 2020
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Indonesia merupakan salah satu negara penghasil komoditas kopi terbanyak di dunia. Tentu hal ini, sangat membanggakan mengingat Indonesia merupakan negara agraris. Selain itu kopi merupakan bahan minuman yang banyak digemari masyarakat. Namun, dalam mengkonsumsi kopi kita perlu waspada akan komposisi kopi yang akan kita konsumsi. Dalam kopi bisa kita temukan logam-logam berbahaya seperti timbal seng, tembaga, merkuri,besi, kadmium, kobalt, timbal, nikel yang terlarut dalam air. LOgam-logam ini kemungkinan berasal dari pemakaian pestisida serta pemupukan yang berlebihan dan dapat juga berasal dari tanah tempat tumbuhnya kopi tersebut. Jika kopi sudah tercemar akan membahayakan kesehatan. Penelitian ini bersifat deskripsi dengan metode Spektrofotometri Serapan Atom (SSA) yang bertujuan untuk menganalisa logam timbal (Pb) dan tembaga (Cu) pada kopi bubuk tidak bermerek yang dijual di beberapa pasar tradisional di Medan. Dari data yang diperoleh diketahui, hasil analisis logam Cu didalam sampel kopi bubuk 1 (KL) menunjukkan kadar logam Cu yang berkisar antara 0,6 mg sampai 0,8 mg dan kadar Pb 0,31 mg/kg sampai 0,42 mg/kg; dan hasil analisis logam Cu didalam sampel kopi bubuk 2 (SS) menunjukkan kadar logam Cu yang berkisar antara 0,7 mg sampai 0,8 mg dan kadar Pb 0,35 mg/kg sampai 0,48 mg/kg; sedangkan hasil analisis logam Cu didalam sampel kopi bubuk 3 (H) menunjukkan kadar logam Cu yang berkisar antara 0,6gram sampai 0,8mg dan kadar Pb o,32mg/kg sampai 0,45 mg/kg . Berdasarkan SNI untuk kopi bubuk, kadar logam Cu maksimal yang diperbolehkan sebesar 30 mg/kg dan Pb sebesar 2 mg/kg. Berdasarkan perolehan data di atas maka dikatakan bahwa ketiga sample kopi bubuk tak bermerek yang dianalisa secara keseluruhan telah memenuhi standar SNI yang telah ditentukan.
ANALISIS PERBANDINGAN KADAR LOGAM CADMIUM PADA PEROKOK AKTIF DAN PEROKOK PASIF DI DESA UJUNG BANDAR KECAMATAN BARUS JAHE KABUPATEN KARO Nova Florentina Ambarwati; Eka Margaretha Sinaga; Tiara Rajagukguk
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 4 No 2 (2020): Volume 4 Nomor 2 Tahun 2020
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Merokok adalah kegiatan yang akrab bagi kita dalam kehidupan sehari-hari. Asap rokok yang disebabkan oleh perokok aktif dapat membahayakan kesehatan para perokok itu sendiri dan perokok pasif. Cadmium (Cd) adalah salah satu senyawa logam yang terkandung dalam tembakau, semakin tinggi tingkat dan semakin lama paparan, semakin besar efek toksik yang akan diberikan. Kadmium logam (Cd) dapat menyebabkan gangguan dan bahkan dapat menyebabkan kerusakan pada sistem yang berfungsi ginjal. Kemudian sisa metabolisme diekskresikan melalui urin. Penelitian ini bertujuan untuk mengetahui rasio kadar kadmium (Cd) dalam urine perokok aktif dan pasif. Jenis penelitian ini adalah penelitian observasional deskriptif dengan metode survei yang bertujuan untuk mengetahui kadar Cd dalam urine aktif dan pasif merokok. Penentuan kadar kadmium (Cd) dengan metode SSA (Atomic Absorption Spectrophotometry). Berdasarkan urin pada perokok aktif terdeteksi kandungan Cd berkisar 0.006 sampai 0.007 ppm. logam cadmium (Cd) kandungan kadmium (Cd) terendah adalah 0.006 ppm. dalam urin perokok pasif, kandungan kadmium (Cd) terendah adalah 0.008 ppm dan tingkat kadmium tertinggi adalah 0.009 ppm. Kemudian diuji Mann Whitney Test dimana nilainya 0,028 kemudian p> 0,05 sehingga Ho diterima dan dapat dinyatakan bahwa tidak ada perbedaan kadar logam cadmium (Cd) dalam urin perokok aktif dan toko pasif didesa ujung Bandar kecamatan barus jahe kabupaten karo
KARAKTERISASI POROSITAS NANOKARBON CANGKANG BUAH SAWIT MENGGUNAKAN SCANNING ELEKTRON MICROSCOPE (SEM) Vivi Purwandari; Hestina Hestina; Zuhairiah Nasution; Hotromasari Dabukke; M Mukmin
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

Referring to data from the Directorate General of Plantations of the Ministry of Agriculture throughout 2019, the area of oil palm plantations in Indonesia is estimated at around 14.68 million hectares, with total production reaching 51.8 million tons per year or the largest in the world. In 1 ton of palm oil produces 6.5% shell waste or 65 kg. Nanocarbons with their unique properties are now widely used in various applications such as batteries, supercapacitors, sensors and so on. Utilization of palm fruit shell waste as a nanocarbon material with a micropore structure, large surface area and high pore volume is the goal of this research.
ANALISA MORFOLOGI CARBON DOTS (C-Dots) DARI AIR TEBU Khairul Amri; Marpongahtun Marpongahtun
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

Carbon dots (C-dots) measuring less than 10 nm are currently the center of attention in nanocarbon materials. C-dots have unique physicochemical and photochemical properties that make C-dots a promising platform for imaging, environmental, catalytic, biological and energy-related applications. Sugarcane (Saccharum officinarum) is an annual plantation crop that is used as raw material for making sugar. The main content of sugarcane juice is sucrose (70-88%). The sugarcane juice content and low price make sugarcane juice suitable for use as a basic material for making carbon dots (C-dots). The process of making C-dots from sugarcane juice is done by adding urea as a passivation agent using the microwave method with a power of 110 watts. Sugarcane juice and urea (10:1) were dissolved with distilled water, stirred and heated at a temperature of 70 C for 15 minutes. The solution was then put in the microwave to dry (20 minutes). The gel formed was then dissolved with distilled water, centrifuged and then dialyzed for 24 hours. Morphological analysis of C-dots was performed by TEM analysis, showing that C-dots had an average diameter of 6.2 nm.
LIMBAH PLASTIK POLYETHYLENE TEREPHLATE SEBAGAI BAHAN CAMPURAN UNTUK PEMBUATAN BATU BATA RAMAH LINGKUNGAN Masdania Zurairah; Moyos Muhammad Yusuf
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

Research has been done on plastic waste as a mixed material in the manufacture of bricks.The plastic waste used is Polyethylene Terephlate (PET) mineral water bottle plastic waste.A comparison is made between plastic and aggregate, with the ratio of plastic: aggregate, namely 50%: 50% is A1, 60%: 40% is A2, and 70%: 30% is A3.The more PET plastic waste, the smaller the volume shrinkage with the results A1 = 1268.65 grams, A2 = 1257.08 grams, A3 = 1246.17 grams where the initial weight is 1,500 grams.The water absorption capacity occurs that the greater the water absorption PET, the smaller the water absorption capacity so that the dry weight is obtained A1 = 1257.08 grams, A2 = 1246.17 grams and A3 = 1246.17 grams.
UJI KUALITATIF ANALISIS KANDUNGAN METAMFETAMIN DARI RAMBUT PENGGUNA SABU-SABU MENGGUNAKAN METODE KOLOM EKSTRAKSI Nur Asyiah Dalimunthe
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

Methamphetamine is a stimulant, with a stronger stimulant effect than cocaine or other natural stimulants. Use in large quantities can cause "violence", hallucinations, and psychosis. Generally, methamphetamine is produced as powder-like crystals, large lumps of crystals, or in tablet form. Its use can be smoked through the nose, drunk, smoked like a cigarette, or injected. Shabu-shabu is a strong central nervous system stimulant drug that has an addictive effect when consumed and is a case of drug abuse mostly dominated by methamphetamine so accurate analysis is needed to detect these compounds. Research has been carried out on the initial study of methamphetamine analysis in the hair of shabu-shabu users using the sonication method and the extraction column. Sampling was carried out randomly from the hair of shabu-shabu users as many as 5 (five) hair samples. The prepared hair sample was then sonicated for 45 (forty five) minutes with various solvent system ratios, namely methanol:acetone:ammonia, ethylacetate:methanol:ammonia and chloroform:methanol:acetic acid. The sonicated filtrate was extracted liquid-liquid with methanol. The extract obtained was then analyzed qualitatively using Marquist's reagent which produces a very clear brownish orange color in the methanol:acetone:ammonia solvent system. The results of the sonication filtrate were continued with solid phase extraction using diatomaceous earth adsorbent and analyzed qualitatively with marquish reagent giving a brownish yellow color.
UJI AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL DAUN JELATANG (Urtica dioica L.) TERHADAP BAKTERI Escherichia coli Dia Moudy Villiya P.; Siti Maimunah
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

Jelatang (Urtica dioica L.) is one of medicinal plants. Jelatang leave contain some compound as alkaloids, flavonoids and saponins. Those compounds are known to have antibacterial activity. This work was to study the antibacterial activity of extract ethanol jelatang leave (Urtica dioica L.) against Escherichia coli. The sample used jelatang leave (Urtica dioica L.) take from the environment Afd VI Kebun Tandun, Kampar, Kecamatan Tapung Hulu, Riau. The research used experimental method with stages as jelatang leave collection, identification of plant, manufacture of simplicia, extract making, skrining of phytochemicals, characterization of simplicia and antibacterial activity test.Powder of jelatang dried were extracted leaves by maceration method using ethanol 96%. Testing antibacterial activity by diffusion method using paper disc. The result of characterization of leaves jelatang powder of jelatang dried was found 9,19% water content, water soluble sari 24,94%, ethanol soluble sari 7,48%, total ash content of 18,46% and acid unsaturated ash content 6,49%. Antibacterial activity test showed that jelatang leave (Urtica dioica L.) ethanol extract could inhibited the growth of Eschericia coli has inhibitory power that is diameter as: extract 20% (5,4 mm) , 22% (6 mm), 24% (7,4 mm) 26% (7,8 mm). Ethanol extract jelatang leave have antibacterial activity the highest concentration 26% as 7,8 mm include medium category
IDENTIFIKASI FORMALIN PADA BEBERAPA JENIS IKAN ASIN DENGAN MENGGUNAKAN METODE FEHLING A DAN FEHLING B DI PUSAT PASAR KOTA MEDAN TAHUN 2021 M B Vista Laia; Dyna Grace Romatua 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

Dried fish is a result of the salting and drying process. Low water content in salted fish is due to absorption by salt and evaporation caused by heat from the sun. There are several types of food that are added with additives that are prohibited from being added to food so that the food is more durable and looks better. Food ingredients that use food additives that are not in accordance with the provisions have a direct influence on the degree of human health. Formalin is not a food additive and is prohibited from being added to food. The purpose of the study was to identify the presence or absence of formalin in several types of salted fish which are traded in the market center of Medan city using the Fehling A and Fehling B methods. The place of this research was carried out in the chemical laboratory, USM Indonesia Medan. In the results of research that has been carried out on 20 samples of salted fish, it shows that salted fish samples with codes F5 and F12 contain formalin. The sample codes F5 and F12 gave a red precipitate after being heated which previously added 1 mL of Fehling A and Fehling B and 18 other samples did not show a red precipitate. After observing all samples, there were 2 samples that were positive for formalin from 20 samples of salted fish studied which were declared ineligible in the Regulation of the Minister of Health of the Republic of Indonesia NO.722|MENKES|PER|IX|88 concerning food additives.

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