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All Journal VALENSI CHEMISTRY PROGRESS PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman Science and Technology Indonesia Indonesian Journal of Chemistry Jurnal Riset Teknologi Industri JURNAL KIMIA SAINTEK DAN PENDIDIKAN Molekul: Jurnal Ilmiah Kimia Journal of Innovative and Creativity Jurnal Sains dan Kesehatan
Subur P Pasaribu
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Journal : PROSIDING SEMINAR KIMIA

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EKSTRASI DAN PENENTUAN KADAR GALAKTOMANAN DARI BUAH NIPAH (Nypa fructicans Wurmb) Andi Fatmawati Padri Hasanah; Subur P. Pasaribu; Erwin Erwin
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Buah nipah (Nypa fructicans Wurmb) merupakan salah satu tumbuhan yang banyak ditemukan di pesisir pantai. Penelitian ini bertujuan untuk mengekstraksi dan menentukan kadar galaktomanan yang terdapat dalam buah nipah. Ekstraksi dilakukan dengan cara merendam bubuk buah nipah (20 g) ke dalam akuades dan diendapkasn menggunakan agen pengendap etanol 96%. Endapan yang diperoleh berwarna putih, dikeringkan kemudian ditimbang. Dari hasil penelitian diperoleh galaktomanan sebanyak 0,12 g. berdasrkan hasil perhitungan rendamen diperoleh sebesar 0,6%. Kata kunci: Nipah, galaktomanan, Ekstraksi, endapan, dan etanol.
SINTESIS METIL ESTER DARI MINYAK BIJI KARET (Hevea brasiliensis ) SEBAGAI BIODIESEL DENGAN KATALIS ABU BUAH BINTARO(Cebera manghas L.) Bagus Muliawan; Subur P Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

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The synthesis of methyl esters from rubber seed oil (Hevea brasiliensis) as biodiesel, using fruit bintaro ash utilization as a source of base catalysts in the transesterification reaction has been conducted. The determination of the base content in the fruit ash bintaro have been researched with alkalinity titration and K ion content determinated with Atomic Absorption Spectrophotometer. Base catalyst were obtained ash bintaro fruit mixed in methanol and used for the transesterification of rubber seed oil. Produce of biodiesel used with ash bintaro fruit weight of variety was 4-8 % (w/w). The fatty acid composition of rubber seed oil from transesterification results determined by using GC-MS, whereas some physical properties of biodiesel determined to know the quality of biodiesel. The results of research shows the of potassium contents in the form of potassium carbonate in ash bintaro fruit are 31.75% (w/w) and conversion of biodiesel obtained from each catalyst are 65.2; 66.6; 73.6; 69.8; and 69.2% (w / w) respectively. Data analiysis GC-MS dominant of fatty acids in the biodiesel contents are metil linoleatewith amount was 42.57%.
OPTIMASI SUHU TRANSESTERIFIKASI MINYAK BIJI KARET (Hevea brasiliensis) SEBAGAI BIODIESEL DENGAN SUMBER KATALIS ABU KULIT BUAH KAPUK (Ceiba petandra) Zia Rahmana Putra; Subur P Pasaribu; Erwin -
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

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Telah dilakukan penelitian biodiesel menggunakan minyak biji karet dan abu kulit buah kapuk yang digunakan sebagai sumber katalis basa. Adanya kadar basa dikarakterisasi menggunakan AAS dan uji alkalinitas dilakukan dengan titrasi asam basa. Berdasarkan penelitian yang telah dilakukan, didapatkan kadar kalium dalam bentuk karbonat sebesar 30,3909%. Pembuatan biodiesel menggunakan campuran metanol dan abu kulit buah kapuk dalam proses transesterifikasi minyak biji karet dengan variasi suhu ruang, 35, 45, 55 dan 65 o C. Nilai konversi biodiesel yang didapatkan sebesar 66,17; 69,48;70,31; 79,36 dan 72,39% dan suhu 55 o C merupakan kondisi yang paling optimal untuk mendapatkan biodiesel yang berkualitas baik dan sesuai standar SNI 7182-2012 yang telah ditetapkan. Untuk mengetahui komposisi metil ester penyusun biodiesel digunakan GC-MS dan komponen metil ester yang memiliki persentase paling besar adalah metil linoleat, yaitu 39,84%.
PENENTUAN KADAR FENOL DALAM AIR LIMBAH MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Anggun Ridha Avitri; Subur P. Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Penelitian tentang analisis kadar fenol dalam air limbah menggunakan Spektrofotometer UV-Vis telah selesai dilakukan. Analisis kadar fenol dalam air limbah mengacu pada SNI 06-6989.21-2004. Parameter penting dalam analisis seperti penentuan nilai pengukuran koefisien korelasi telah dilakukan. Hasil penelitian pengukuran linearitas menunjukkan hasil yang baik, hal ini ditunjukkan dengan nilai koefisien korelasi fenol sebesar 0.9921. Nilai presisi dalam sampel fenol sebesar 0,0024 %. Penentuan kadar fenol dalam air limbah telah dilakukan menggunakan Spektrofotometer UV-Vis dengan hasil yang baik. Kata kunci: fenol; air limbah; Spektrofotometer UV-Vis.
UJI FITOKIMIA DAN UJI TOKSISITAS EKSTRAK KASAR DAUN, BATANG DAN KULIT BATANG TANAMAN DURIAN (Durio zibethinus Murray) Ade R. Fajaryantie; Erwin Erwin; Subur P. Pasaribu
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Durian (Durio zibethinus Murray) termasuk buah-buahan yang dapat dimakan. Secara tradisional, daun durian telah lama dikenal dan dimanfaatkan oleh masyarakat untuk menurunkan demam. Tujuan penelitian ini adalah untuk mengetahui kandungan metabolit sekunder yang terkandung dalam ekstrak kasar daun, batang dan kulit batang tanaman durian serta menentukan tingkat toksisitasnya terhadap larva udang (Artemia salina L.) dengan metode Brine Shrimp Lethality Test (BSLT). Hasil uji fitokimia menunjukkan bahwa ekstrak kasar daun durian mengandung metabolit sekunder golongan flavonoid dan alkaloid, ekstrak kasar batang mengandung flavonoid dan alkaloid serta ekstrak kasar kulit batang mengandung flavonoid, alkaloid, triterpenoid dan saponin. Berdasarkan uji toksisitas, kasar kulit batang tanaman durian bersifat sangat toksik dengan nilai LC50 4,43 ppm sedangkan ekstrak kasar daun dan batang durian bersifat toksik dengan nilai LC50 berturut-turut 45,26 ppm dan 54,98 ppm. Kata kunci: Durian, fitokimia, toksisitas, metabolit sekunder dan BSLT.
UJI TOKSISITAS (Brine Shrimp Lethality Test) EKSTRAK DAN ISOLAT FRAKSI KLOROFORM DARI DAUN KEREHAU (Callicarpa longifolia Lamk.) Arie Novadiana; Erwin -; Subur P Pasaribu
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

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Kerehau (Callicarpa longifolia Lamk.) is one of the biodiversity used as traditional medicine by one of the indigenous tribes of Borneo, called Dayak Tunjung. The purpose of this study was to determine about toxicity level of the Kerehau leaves (Callicarpa longifolia Lamk.) to larvae shrimps (Artemia Salina Leach) and to determine the content of the active compounds contained in the Kerehau leaves (Callicarpa longifolia Lamk.). The research was conducted by extracting samples with methanol and then concentrated by rotary evaporator. Total extract fractionated with n-hexane and chloroform, and then column chromatography applicated to chloroform fraction. Phytochemicals and BSLT have been test to Isolates chromatography results, total extract and chloroform extracts to determine the level of toxicity. Based on the results test of phytochemical compounds secondary metabolites of Kerehau leaves (Callicarpa longifolia Lamk.) indicated that the methanol extract containing steroid compounds, phenolics, and flavonoids. Chloroform fractions containing flavonoids and steroid compounds. Isolates Chloroform fraction containing Steroids compounds. On Brine Shrimp Lethality Test, death of larvae shrimps (Artemia Salina Leach) were recorded and processed using SAS Probit analysis to determine the value of Lethal Concentration (LC 50 ) to the value of each is, in chloroform isolates with LC 50 values of 96.4096 ppm, chloroform extract had LC 50 values of 104.1878 ppm and methanol extract had LC 50 values of 485.1681 ppm.
UJI FITOKIMIA, TOKSISITAS DAN AKTIVITAS ANTIOKSIDAN ALAMI DAUN TUMBUHAN KELAKAI (Stenochlaena palustris) DENGAN METODE DPPH Bonita Tahir; Chairul Saleh; Subur P Pasaribu
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

The phytochemical test, brine shrimp lethality test and activity antioxidant test and secondary metabolits of kelakai(Stenochlaena Palustris) leaves have been researched. The leaves samples are extract with solvent methanol by masseration method and that is concentrated by using rotary evaporator. The methanol crude extract obtained are fractioned with solvent n-hexane and. Solvent ethyl acetat.Based on secondary metabolits phytochemical test of kelakai leaves showed that methanol raw extract contains steroid, alkaloid and flavonooid. n-hexane fraction extract contains steroid and alkaloid Ethyl acetat fraction extract contains alkaloid, steroid, flavonoid and saponin.In brine shrimp lethality test, the increase larvae death and data was yielded recorded and processed using SAS Probit Analysis to determine the lethal concentration 50 % (LC 50 ) value. The results of this test obtained data and showed that the most active fraction is ethyl acetat fraction extract withvalue of LC 50 was equel to 88,8477 ppm.Based on the antioxidant activity conducted by scavenging activity of DPPH usedspectrophotometry. Based on the result be held researched was obtained that Inhibition Concentration 50% (IC 50 ) that methanol raw extract value of 185,92 ppm, n-hexane fraction value of 520,64 ppm and athyl acetat fraction 107,49 ppm and vitamin C is value of 3,064 ppm, can be axpressed that the result of this test showed that the most active fraction is ethyl acetat with value of IC 50 equel to 107,49 ppm.
SKRINING FITOKIMIA DAN BIOAKTIVITAS EKSTRAK DAUN, BATANG DAN KULIT BATANG TANAMAN INSULIN (Smallanthus sonchifolius) Irna Febrianti; Erwin Erwin; Subur P. Pasaribu
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Tanaman insulin (Smallanthus sonchifolius) merupakan salah satu tanaman dari famili Asteraceae yang telah dikenal dan dimanfaatkan oleh masyarakat Indonesia sebagai obat penyakit diabetes. Penelitian ini bertujuan untuk mengetahui golongan senyawa yang terkandung dalam ekstrak daun, batang dan kulit batang tanaman insulin (Smallanthus sonchifolius) serta menentukan tingkat toksisitasnya terhadap larva udang Artemia salina L. dengan metode Brine Shrimp Lethality Test (BSLT). Hasil yang didapatkan esktrak daun insulin mengandung senyawa metabolit sekunder golongan flavonoid, alkaloid dan steroid; ekstrak batang tanaman insulin mengandung senyawa metabolit sekunder flavonoid, alkaloid, fenolik dan kuinon; ekstrak kulit batang tanaman insulin mengandung senyawa metabolit sekunder flavonoid, alkaloid, saponin dan fenolik. Berdasarkan uji toksisitas, ekstrak daun dan batang tanaman insulin bersifat toksik dengan nilai LC50 berturut-turut 136,8674 ppm dan 52,6138 ppm sedangkan ekstrak kulit batang tanaman insulin bersifat sangat toksik dengan nilai LC50 27,7459 ppm. Kata kunci: Smallanthus sonchifolius, fitokimia, toksisitas, BSLT
ANALISIS KADAR MERKURI (Hg) DALAM AIR SUNGAI MENGGUNAKAN METODE COLD VAPOR-ATOMIC ABSORPTION SPECTROPHOTOMETRY (CV-AAS) Margaretta D. R. N. S; Subur P. Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Analysis of mercury (Hg) levels in river water using the cold vapor-atomic absorption spectrophotometry (CV-AAS) method has been carried out. The basic principle of determining Hg in several river water samples is carried out by means of Hg2+ ions being reduced by reductants Sn2+ into gaseous Hg0 atoms, and then the Hg0 atomic vapors were analyzed quantitatively by the CV-AAS method at a wavelength of 253.7 nm. The analytical performance of the measurements obtained was very good, indicated by the linearity value (r) = 0.991, the Quality Control (QC) value) Hg is below the standard, which is 10%, and the results of mesurement of Hg levels in water samples around range concentration was -1.0305 sampai -0.7328 ppb. These results indicate that the Hg level in river water, according to Government Regulation No. 22 of 2021 concerning Implementation of Environmental Protection and Management, is below the threshold of the quality standard. Keywords: Hg, cold vapor-atomic absorption spectrophotometry (CV-AAS), River waters
PEMBUATAN DAN KARAKTERISASI EDIBLE FILM GALAKTOMANAN DARI BUAH NIPAH (Nypa fruticans Wurmb) DENGAN INKORPORASI EKSTRAK METANOL DAUN TAHONGAI (Kleinhovia hospita L.) SEBAGAI ANTIOKSIDAN Shintia Alifah R; Subur P. Pasaribu; Erwin Erwin; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Fabrication and characterization of edible films from galactomannan nipah fruit (Nypa fruticans Wurmb) with the incorporation of methanol extract of tahongai leaf (Kleinhovia hospita L.) as an antioxidant has been conducted. This study aims to determine the best concentration of methanol extract of tahongai leaves to increase the antioxidant activity of edible films using the DPPH (1,1-diphenyl-2-picrylhydrazyl) method. The results showed that the edible film containing galactomannan 1.5%, glycerol 25% and methanol extract of tahongai leaves with concentrations of 0%, 1%, 2%, 3% and 4% showed antioxidant activity with IC50 values of 224.02 mg/L, 215.82 mg/L, 153.51 mg/L, 129.48 mg/L and 107.87 mg/L respectively. The concentration of incorporation of methanol extract of tahongai leaves to produce the best edible film is 3% which increases antioxidant activity when compared to edible films without incorporation with properties having a moisture content of 15.04%, thickness of 0.21 mm, water vapor transmission of 43.70 g/m2/hour and SEM (Scanning Electron Microscopy) analysis showed the surface morphology was homogeneous and slightly rough. Keywords : Edible film; Galactomannan; Tahongai leaves; Antioxidant activity
Co-Authors Abdul Aziz Ade R. Fajaryantie Aman S. Panggabean Aman Sentosa Panggabean Andi Fatmawati Padri Hasanah Anggun Ridha Avitri Anggun Ridha Avitri Anwar, Adliah Arie Novadiana Arie Novadiana, Arie Az-zahraa, Mutiara Nur Bagus Muliawan Bohari Bohari Bohari Bohari Bonita Tahir Buchari Buchari Chairul Saleh Chairul Saleh Daniel Daniel Daniel Daniel T Daniel T, Daniel Djihan Ryn Pratiwi, Djihan Ryn Erwin - Erwin - Erwin Erwin Erwin Erwin Eva Marliana, Eva Fadilah Ramadhani Fahmi, Miraz’hul Farida Kristiana Febrianti, Irna Hairani, Rita Hairus Abdullah Hardy Shuwanto Ika Y. L. Sari Indra Masmur Irna Febrianti Jamaran Kaban Jenni Lie Josephine Josephine, Josephine Juntia Kirana Pratiwi Kasmirul Ramlan Sinaga Lianasari, Ika Yekti M. Bachri Amran Magdaleni, Agustina Rahayu Margaretta D. R. N. S Masmur, Hestina Mayang, Julia Agustin Mimpin Ginting Muhammad Robiansyah Nanang Tri Widodo Ningrum, Tika Setia Noviyanti Y Noviyanti Y, Noviyanti Nur, Nana Septiana Nurhasanah Nurhasanah Oktavia, Dwina Putri Putri Istiyanti Putri Istiyanti, Putri Putri, Amelia Rachmat, A. Khafifah Dwi Rico Ramadhan, Rico Ritson Purba, Ritson Rohmat Hidayat Rohmat Hidayat Rudi Kartika, Rudi Ruga, Ritbey Rumengan, Nur Khamillah Saibun Sitorus Septarini, Firda Nurlaili Shintia Alifah R Sujito Sujito Teguh Wirawan, Teguh Wahidatul Nuriah Winni Astuti Wirdhaningsih Wirdhaningsih Yusuf, Irfan Maulana Zia Rahmana Putra