STANNUM : Jurnal Sains dan Terapan Kimia http://journal.ubb.ac.id/index.php/stannum <p><strong>Stannum : Jurnal Sains dan Terapan Kimia</strong> is published twice every year in March and October by Department of Chemistry, Faculty of Engineering, University&nbsp; of Bangka Belitung. We are&nbsp;accepting manuscript research article, minireview/review, and short communication that covering all aspects of chemistry, chemical engineering, and applied chemistry in English or Bahasa.&nbsp;</p> <p><strong>(e ISSN 2714-8173, p ISSN&nbsp;2714-674X)</strong></p> id-ID robbygusmahardika@gmail.com (Robby Gus Mahardika) verry.andre.f@gmail.com (Verry Andre Fabiani) Sel, 15 Okt 2019 00:00:00 +0000 OJS 3.1.1.2 http://blogs.law.harvard.edu/tech/rss 60 Uncertainty Estimation of the Fe Content Measurement in the Clean Water Using UV- Vis Spectrophotometer http://journal.ubb.ac.id/index.php/stannum/article/view/1141 <p>Good laboratories should be able to apply procedures uncertainty for measuring of both conventional and instrument equipment. As well as the testing for Fe content using UV-Vis Spectrophotometer. As for the purpose for calculating the uncertainty estimated to determine the range of values within which estimated the true value of the testing standard solution Fe using UV-Vis Spectrophotometer. The uncertainty estimation are influenced by several factors such as sample used, reading of spectrophotometer, repeatability, sample volume. The uncertainty of the calculation obtained a value of ± 0,02 mg/L. Further testing of Fe content in the clean water using UV-Vis Spectrophotometer &nbsp;at the 500 nm wavelength which forms an orange solution as indication of Fe content in the water. The result of Fe content has quality standards according to the spesifications issued by ministry of health Republic of Indonesia &nbsp;in 2010 for drinking water.</p> Adi Syahputra ##submission.copyrightStatement## https://journal.ubb.ac.id/index.php/stannum/index http://journal.ubb.ac.id/index.php/stannum/article/view/1141 Sen, 14 Okt 2019 00:00:00 +0000 Function Groups Analysis of Wood-Plastic Composite with Plasctic Waste and Pelawan’s Wood Sawdust (Tristaniopsis merguensis) http://journal.ubb.ac.id/index.php/stannum/article/view/1179 <h4>One of the efforts in tackling the increasingly large amount of plastic waste is to synthesize composite material from plastic waste with Pelawan’s wood sawdust <em>(Tristaniopsis merguensis)</em> as a raw material for the uphold of pepper plants. Pelawan is one of the endemic plants in the Bangka Belitung Islands Province. The characteristic observed in this study is the functional group of plastic waste composites with Pelawan’s wood sawdust, which was obtained from FTIR analysis. The method used in this study is to mix plastic waste and wood dust against contraper with variation ratio (wt / wt). The results of this FTIR show that there is an effect of the ratio of the amount of plastic waste and wood dust against the intensity of IR absorption. Based on IR data, the presence of absorption peak of FTIR spectrum at wave number 3327 cm<sup>-1</sup> and widening of absorption in the region of wave number 3000-3550 cm<sup>-1</sup> indicates the presence of O-H functional groups. The absorption band of the O-H vibrations is due to the presence of water molecules found in cellulose contained in the Pelawan’s wood sawdust. The absorption peak at wave number 1737 cm<sup>-1</sup> indicates the existence of strain vibrations from the functional group C=O. While the absorption peak at wave number 1300-1000 cm<sup>-1</sup> indicates the existence of stretch vibration from C-O. Therefore, the absorption tapes indicate the presence of cellulose originating from Pelawan’s wood sawdust which has been bound to plastic.</h4> Ristika Oktavia Asriza, Diah Humaira, Sri Hawa T Insan, Zomi Zomi ##submission.copyrightStatement## https://journal.ubb.ac.id/index.php/stannum/index http://journal.ubb.ac.id/index.php/stannum/article/view/1179 Sen, 14 Okt 2019 00:00:00 +0000 Total Phenolic and Antioxidant Capacity of Acetone Extract of Tristaniopsis merguensis Leaves http://journal.ubb.ac.id/index.php/stannum/article/view/1274 <h4>The purpose of this study was to determine the total phenolic and antioxidant capacity of <em>Tristaniopsis merguensis</em> leaf acetone extract. In this study extraction using the maceration method for 3 days with a ratio of dry leaves and solvents of 1: 10 (w / v). Analysis of total polyphenols in this study was carried out using the Follin-Ciocalteu method. Total polyphenols were measured based on gallic acid standards. The antioxidant capacity is calculated based on the DPPH method. The results of this study, obtained extract yield of 9.34%. The total phenolic content of the <em>Tristaniopsis merguensis</em> leaf acetone extract was 215.22 mg GAE / g DW. While the antioxidant capacity of the acetone extract has an IC<sub>50</sub> value of 22,1454 µg / mL.</h4> Occa Roanisca, Robby Gus Mahardika, Fajar Indah Puspita Sari ##submission.copyrightStatement## https://journal.ubb.ac.id/index.php/stannum/index http://journal.ubb.ac.id/index.php/stannum/article/view/1274 Sen, 14 Okt 2019 00:00:00 +0000 Antioxidant Activity Test for Rukam Fruit (Flacourtia rukam) Of Maseration Extract http://journal.ubb.ac.id/index.php/stannum/article/view/1417 <p>Rukam fruit (<em>Flacourtia rukam</em>) is one of the wild plants that are widely distributed in Indonesia, especially on the island of Bangka. The results of previous studies stated that rukam fruit has a phenolic content of 40 mg GAE / 100 grams. Phenolic compounds have major benefits as antioxidants, where antioxidants have the ability to inhibit the work of free radicals. Therefore a study was conducted to assess the content of secondary metabolites and the antioxidant bioactivity of the Flacourtia rukam species using maceration method. Rukam fruit extract was obtained using the Maceration method. As for the antioxidant test using the DPPH` method. The results of the antioxidant activity test of rukam extract with ethanol solvent obtained IC<sub>50</sub> value 236,169 µg / mL and in rukam extract with acetone solvent obtained IC<sub>50</sub> 276,443 µg / mL which showed that the antioxidant properties of this rukam were moderate.</p> Inas Fadiyah, Iin Lestari, Shelly Victory ##submission.copyrightStatement## https://journal.ubb.ac.id/index.php/stannum/index http://journal.ubb.ac.id/index.php/stannum/article/view/1417 Sel, 15 Okt 2019 00:00:00 +0000 Isolation of Essential Oils from Essential Roots (Vetiveria zizanoides L.) with Preparation Using Liquid Nitrogen http://journal.ubb.ac.id/index.php/stannum/article/view/1418 <h4>Fragrant root oil production can be done by various methods including distillation, pressing, extraction using solvents and extraction using solid fat. Efforts to increase the production of quality fragrant root oil before the extraction process carried out 2 treatments on the sample, namely chopping and preparation using liquid nitrogen. Research that has been carried out sample preparation using N<sub>2</sub> <em><sub>(l)</sub></em> has proven to be effective in increasing oil yield. In fresh samples, the yield of oil obtained from the steam-hydro distillation method is 0.84% (variation 1) and 1.2% (variation 2) while for the socletation method is 1% (variation 1) and 2.4% ( variation 2). From the results of GC-MS analysis, the fragrant root oil of the dry sample was identified as composed of 68 components and there were 2 components that were suspected as oil fingerprints namely khusimene (4.44%) and nootkatone (2.02%)</h4> Arif Ashari ##submission.copyrightStatement## http://journal.ubb.ac.id/index.php/stannum/article/view/1418 Sel, 15 Okt 2019 00:00:00 +0000 The Adsorption Efficiency of Lead From Post-Tin Mining Water using Nanomagnetic Fe3O4/Chitosan Portunus pelagicus shells http://journal.ubb.ac.id/index.php/stannum/article/view/1271 <p>Adsorption was carried out on the water of post tin mining using nanomagnetic Fe<sub>3</sub>O<sub>4</sub>/chitosan from Portunus pelagicus shells. Nanomagnetic Fe<sub>3</sub>O<sub>4</sub>/Chitosan was prepared for lead adsorption. The nanomagnetic Fe<sub>3</sub>O<sub>4</sub> was characterized through XRD and chitosan was characterized through FTIR The concentration of Pb in post tin mining water is 0,36 ppm. This study varied the mass of Fe<sub>3</sub>O<sub>4</sub> and stirring time. The adsorption results were analyzed by AAS and obtained the largest adsorption efficiency (58,33%) at stirring 30 minutes with a mass of Fe<sub>3</sub>O<sub>4</sub> of 75 mg.</p> Verry Andre Fabiani, Eva Julianti, Ary Samsiar, Ristika Oktavia Asriza ##submission.copyrightStatement## https://journal.ubb.ac.id/index.php/stannum/index http://journal.ubb.ac.id/index.php/stannum/article/view/1271 Sel, 15 Okt 2019 00:00:00 +0000