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All Journal Agrintech: Jurnal Teknologi Pangan dan Hasil Pertanian EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA
Harlem Marpaung
Departemen Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Computer Science & IT Education

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Sosialisasi Penjernihan Air Baku Dengan Menggunakan Elektrokoagulasi Di SMP & SMA Dr. Wahidin Sudirohusodo Harlem Marpaung; Rikson Siburian; Crystina Simanjuntak
Agrintech: Jurnal Teknologi Pangan dan Hasil Pertanian Vol 1, No 2 (2018)
Publisher : UNIVERSITAS MUHAMMADIYAH SUMATERA UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.167 KB) | DOI: 10.30596/agrintech.v1i2.2013

Abstract

This Research has been done in one of Junior and Senior High Schools of Dr. Wahidin Sudirohusodo by using water samples at the site for iron absorption by electrolysis method using aluminum electrode. By using visible spectrophotometer and standard solution of FeCl3.6H2O series can be obtained iron content before eletrolisis, ie 1 = 2.5548 mg / L and sample 2 = 1.4458 mg / L. After electrolysis and measured iron content using visible spectrophotometry and standard solution of FeCl3.6H2O series, iron absorption results obtained in sample 1 were 44.90% and in sample 2 were 21.84%.
PERBANDINGAN KANDUNGAN ASAM SINAMAT DAN ASAM BENZOAT DALAM KEMENYAN (Styrax benzoin) KUALITAS I,III DAN V YANG DIPEROLEH DARI DAERAH TAPANULI UTARA DENGAN METODE KROMATOGRAFI GAS Fatma Suryani Harahap; Harlem Marpaung
Eksakta : Jurnal Penelitian dan Pembelajaran MIPA Vol 3, No 1 (2018): Eksakta : Jurnal Penelitian dan Pembelajaran MIPA
Publisher : Fakultas Keguruan Dan Ilmu Pendidikan, UM-Tapsel

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (47.146 KB) | DOI: 10.31604/eksakta.v3i1.42-47

Abstract

AbstractA research has been done about the comparation of the cinnamic acid and benzoic acid content in the frankincenses (Styrax benzoin) quality I, III and V which of obtained from Pangaribuan region (North Tapanuli). The cinnamic acid and benzoic acid content are analyzed by using Gas Chromatography with injection volume 1 µl. The data is analyzed qualitatively by measuring the retention time standard solution, with cinnamic acid and benzoic acid content are determained by using calibration curve with linier regretion from least square method. The result show the cinnamic acid and benzoic acid from the frankincenses class I is 26, 4303 %, and 3,3573 %, frankincenses class III is 26,0270%  and 2,0705%, frankincenses class V is 0,2884% and 1,5916%.Keywords : Frankincenses, cinnamic acid, benzoic acid, Gas Chromatography
Co-Authors Fatma Suryani Harahap Rikson Siburian Simanjuntak, Crystina