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Stannum : Jurnal Sains dan Terapan Kimia
Published by Universitas Bangka Belitung
ISSN : 2714674X     EISSN : 27148173     DOI : https://doi.org/10.33019/jstk
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering
Jurnal Sains dan Terapan Kimia published research article, minireview/review, and short communication that included studies in Inorganic Chemistry, Organic Chemistry, Analitycal Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Chemical Engineering, and Applied Chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 53 Documents
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Concentration Optimization Na2CO3 Alginates from Turbinaria sp. as Raw Material Electrolite Polymer for DSSC Dinda Liyana; Nurhadini Nurhadini; Ristika Oktavia Asriza
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 1 (2021): April 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i1.2238

Abstract

Polymer electrolyte DSSC is one component of the application can convert solar energy into electrical energy. The polymer electrolyte can be synthesized from brown seaweed Turbinaria sp. However, the optimization of alginate extraction has not been widely carried out, so the aim of this study was to determine the optimum conditions for variations in the concentration of Na2CO3 (3%, 5%, 7%) in extracts from Turbinaria sp as raw material for polymer electrolyte synthesis for DSSC. Alginate optimum extraction results known by percentage yield, moisture content and functional groups using FTIR analysis. The optimum conditions for alginate extraction from Turbinaria sp are Na2CO3 5% and a temperature of 60 oC with a yield of 23.81% and a moisture content of 8.1%. FTIR results also indicate the intensity of the strongest mannuronic seen at 822cm-1 wave numbers.
Synthesis and Characterization of Cual Batik Waste Dyes From Photocatalysis Using TiO2 From Ilmenite Bangka Fuspita Istiqomah; Verry Andre Fabiani; Adisyahputra Adisyahputra
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2199

Abstract

Cual batik is one of the local products of the Bangka Belitung Islands. The expansion of cual batik in Bangka Belitung continues to increase, resulting in an increase in the production of cual batik cloth. Cual batik contains remasol dyes which are carcinogenic so that waste handling is appropriate and safe for the surrounding environment. One of them is using the TiO2 photocatalytic method from ilmenite Bangka. The results of XRF characterization showed that the TiO2 content after magnetic separator and HCl washing reached 69,975% and 77,260%. The results of XRD characterization showed that the optimal temperature of calcination was at 700ºC with the peak diffraction intensity of anatase TiO2 crystals at 2θ 48.9º, 53.53º and 53.92º. In FTIR characterization, there is a functional group spectrum of titanium dioxide (TiO2) at the absorption wave number 795 cm-1 showing Ti-O-Ti stretching vibrations, at wavenumber 2326 cm-1 showing Ti-O stretching vibrations. The results of photodegradation of cual batik waste showed a decrease in the dye content of remazol briliant blue when exposed to UV lamps and sunlight at contact times of 30, 60, and 90 minutes 85.21%, 82,75%, and 86,72% (UV light); 70,75%, 78,92%, and 93.51% (sunlight).
Validasi Modifikasi Metode Volumetrik Penentuan Konsentrasi Sn (Timah) Pada Konsentrat Timah Onek Gunawan; Nandya Tania; Yulismawati Yulismawati
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2338

Abstract

The analysis techniques for determining the concentration of Stanum (Sn) in Tin Concentrate has been developing since the 19th century. Various methods and analysis techniques are to find the most effective and efficient method enabling to achieve optimal results. In this study, a modification of the classic volumetric method that has been used includes modifications to the use of materials and tools in the analysis. In this study, validation and verification of the modified method was also carried out by determining the value of the parameters of Precision, Accuracy, Method of Detection Limit (MDL) and the Ruggedness and Robustness of the method and comparing the acceptability value based on the existing provisions. on the EURACHEM guide. After performing 25 tests using the NCS DC 35002 Certified Reference Material, it was revealed the value of the parameters for the Precision/Relative Standard Deviation (RSD) to be 0.21% (<0.5 CV Horwitz), the accuracy value is 99.9% with bias 0.06%, the MDL values for Minimum Detection Limit (MDL) and Limit of Quantification (LOQ) are 0.4% and 1.32%, respectively. The value of the ruggedness and robustness of the method was carried out by testing at different times and by different analysts and obtained RSD 0.22% (<2/3 CV Horwitz). From the values of the parameters obtained, it can be concluded that the modification of this method fulfills the acceptance value required by EURACHEM.
Potensi Nasi Aking Sebagai Piring Biodegradable (Bioplastik) Ditinjau Dari Karakteristiknya Hamidah Hamidah; Hasan Muzaki; Nurul Kholidah
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2382

Abstract

Rice flour is biopolymer that be used the main ingredient for making bioplastic (Biodegradable plate). Product formation is done rice flour dan startfruit (Averrhoa bilimbi L). The purpose of this study was to determine the effect of adding starfruit filtrate (Averrhoa bilimbi L) to water absorption and biodegradation. This study uses the phase inversion method with variations in the volume of the startfruit filtrate (Averrhoa bilimbi L) much as 10 ml,15 ml, 20 ml, and 25 ml. The result of the formation of biodegradable plates with the addition of startfruit (Averrhoa bilimbi L) filtrate produce a brown color, hard texture, and rough on the surface og the product. The Result showed that each addition of starfruit filtrate (Averrhoa bilimbi L) volume could increase the charachteristic of water absorption and biodegradation with each percentage 48,29 %, 51,78 %, 53,62%, 55,27 % and 11,77 % 24,52 %, 28,42 %, 36,88 %. Confirmation of the product surface through scanning electron microscopy provides information that the resulting bioplastic has a less dense particle arrangement and the formation of pores on the surface. starfruit filtrate (Averrhoa bilimbi L) can be used in modifying because contains compounds that are weakly acidic with pH 5.
Antioxidant Activity of Uli Banana Peel Extract (Musa x Paradisiaca L. AAB) Fennia Ade Heriani; Suci Permata Sari; Ade Oktasari
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2386

Abstract

Banana plants are native to Indonesia wich are easy to find and have various benefits ranging from roots, stems, fruits until peel. Uli banana (Musa x Paradisiaca L. AAB) is one kind of processed banana that is easy to find. The study aimed to determine the antioxidant activity of banana peel extract of uli (Musa x Paradisiaca L. AAB) wich was carried out by maceration using n-hexane and ethanol solvents then fractionated with ethyl acetate and distilled water. Phytochemical screening showed that the uli banana peel extract contained flavonoids and tannins. Antioxidant activity was measured by using UV-Vis Spectrophotometry with the DPPH (2-2, diphenyl-1-picrylhydrazyl) method and IC50 (Inhibitory Concentration) test parameters. The results showed that the antioxidant activity of IC50 was 114.86 µg/ml which was classified as moderate antioxidant intensity.
Synthesis Of Mg/Al Hydrotalsite-Magnetite As CN- Ion Adsorbent On Wastewater Tapioca Industry Maudi Aulia; Fajar Indah Puspita Sari; Ristika Oktavia Asriza
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2506

Abstract

Cyanide compounds contained in tapioca industrial wastewater are relatively high, so it is necessary to reduce cyanide levels. This study utilizes the hydrotalcite-magnetite ability to adsorption of CN- ions. The composite formation process is carried out by mixing the magnetite phase at the stage of hydrotalcite-magnetite synthesis. The characterization of X-Ray Diffraction (XRD) shows reflection of the magnetite peak of 2θ 21.42°; 30,28°; 33.40°;35.65° and 37°. While the peak of hydrotalocites at an angle of 11.66° ; 23,33° ; 34,80° ; 60,92° ; and 62.21°. This result is supported by ir spectra on hydrotalocytes shown by O-H group at wave number 3441 cm-1, O=C-O at wave numbers 1359 cm-1, M-O and M-OH at wave numbers 964 cm-1, 797 cm-1 and 673 cm-1. Fe-O and Fe-OH absorption from magnetites at wave numbers 892 cm-1, 798 cm-1 and 629 cm-1. 0.4 grams of hydrotalcite-magnetite at 30 minutes of stirring absorbed 0.0490 mg/L of cyanide from tapioca liquid waste solution. The value of adsorption capacity is 0.022 mg/g and the adsorption efficiency is 87.96%. The hydrotalcite-magnetite adsorption method is superior to aerob and anaerobic methods using bacteria in the tapioca industry.
The Toxicity Test on Larvae of Shrimp (Artemia salina L.) of Lindur Fruit Peel Extract (Bruguiera gymnorrhiza) and Identification of Its Bioactive Compounds Ana Mardliyah; Undri Rastuti; Santi Nur Handayani
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2548

Abstract

Indonesia is the most mangrove-rich country, both in terms of area quantity and number of species. Mangrove plants have potential as a source of medicinal compounds. Bruguiera gymnorrhiza is a type of mangrove plant which is a source of medicinal plants from the Rhizoporaceae family. Ethanol extract of the stem bark of B. gymnorhiza has been known to have cytotoxic activity with an IC50 of 508.19 µg/mL against myeloma cancer cells (Rahmah, 2021). The aim of this study was to determine the toxicity of lindur fruit peel extract (B. gymnorrhiza) on Artemia salina Leach shrimp larvae. Lindur fruit peel extraction was carried out by maceration method using methanol solvent which was then fractionated with n-hexane and ethyl acetate as solvent. All extract fractions obtained were then tested for toxicity against shrimp larvae Artemia salina Leach by BSLT (Brine Shrimp Lethality Test) method. Extract fractions with the highest toxicity were identified for their bioactive compounds using UV-Visible and FT-IR spectrophotometers. The results of the toxicity test showed that the lindur fruit peel extract was toxic to A. salina L. and the most toxic fraction was the n-hexane fraction with an LC50 value of 34.109 ppm. The results of the analysis using UV-Visible and FT-IR spectrophotometers the active compound in the hexane fraction of lindur fruit extract (B. gymnorrhiza) contains terpenoid which has double bond conjugated that showed by the existence of an electronic transition of π →π* that was conjugated and there are clusters of -OH, C=O, C=C, aromatic, C-H and C-O groups.
Nanoemulsi Fraksi Daun Pelawan (Tristaniopsis merguensis Griff) Sebagai Antidiabetes Ary Samsiar; Robby Gus Mahardika; Occa Roanisca
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2290

Abstract

Diabetes mellitus is an increased level of sugar in the blood and the secretion of glucose in the urine due to metabolic disorders of insulin secretion. Efforts to treat diabetes mellitus can be done with therapy and drugs, but this can cause side effects. Diabetes can also be treated using herbal ingredients from nature. This study aims to determine the potential of pelawan leaves as an antidiabetic in the form of nanoemulsion.The pelawan leaves were extracted with acetone, then partitioned using MeOH solvent: water, again partitioned with ethyl acetate, then partitioned with n-hexane solvent. The nanoemulsion was prepared using a homogenizer at a stirring speed of 8000 rpm for 30 minutes with a composition of 2.5 ml VCO, 10 ml tween 80 and 37.5 ml water. Nanoemulsion from the MeOH: water and ethyl acetate fraction had better characteristics than the n-hexane fraction nanoemulsion. MeOH fraction nanoemulsion: water has a particle size of 123.8 nm, while ethyl acetate has a particle size of 153.9 nm. Meanwhile, the n-hexane nanoemulsion preparation had the characteristics of a larger particle size, namely 361 nm, and had a polydispersity index of 0.625 nm. The antidiabetic test using ethyl acetate fraction can inhibit α-glucosidase by 1.075% at a concentration of 2.5 mg / ml.
Phytochemical Analysis and Antifungal Activity of Phoebe excelsa Nees Leaf Extract Anis Nurohma; Occa Roanisca; Ristika Oktavia Asriza
Stannum : Jurnal Sains dan Terapan Kimia Vol 4 No 1 (2022): April 2022
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v4i1.2484

Abstract

Candidiasis is an infection caused by the fungus Candida albicans. Candidiasis was recorded in the second highest position as an infectious disease that accompanies HIV/AIDS, as many as 266 cases. Candidiasis is the highest infection caused by fungi and is opportunistic. Infections caused by candida albicans can generally be treated with antifungal medications. However, the use of drugs in the long term can cause resistance to these drugs, besides antifungal drugs can also cause various side effects. Therefore, in this study, an assessment of the phytochemicals of the ethanol extract of medang sang’s leaves and its bioactivity as antifungal Candida albicans will be carried out. Testing the content of secondary metabolites in medang’s leaves was carried out qualitatively by observing changes in the sample when reacted with reagents. Testing the antifungal activity of the ethanol extract of medang sang’s leaves was carried out in-vitro using the disc diffusion method. Results Based on the test, the ethanol extract of medang sang’s leaves contains alkaloids, flavonoids and tannins. The results of testing the antifungal activity of Candida albicans showed no inhibition, this was because the tang compound contained in the ethanol extract of medang sang’s leaves did not have antifungal activity against Candida albicans.
Characterization of Cassava (Manihot esculenta Crantz) Peel Activated Carbon based on Impregnation Ratio and Activation Temperature Blessy Yemima Andiani; Cucun Alep Riyanto; Yohanes Martono
Stannum : Jurnal Sains dan Terapan Kimia Vol 4 No 1 (2022): April 2022
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v4i1.2533

Abstract

Cassava peel is a natural material that is still underutilized even though has the potential as an alternative to activated carbon precursors. In the synthesis of activated carbon, the impregnation ratio and activation temperature are important factors that affect the characteristics of the activated carbon produced. This study aims to determine the effect of variations in the impregnation ratio (carbon: H3PO4) and activation temperature on the characteristics of activated carbon from cassava peel (CPAC) and to determine the optimal conditions in the manufacture of CPAC. In this study, CPAC was produced by treatment with various impregnation ratios of 1:5, 1:6, 1:8, 1:10, and 1:12 (w/w, carbon: H3PO4 30%) and a range activation temperature variation of 400 - 800 °C in the furnace for 60 minutes. The CPAC results were analyzed using FTIR, XRD, and SEM-EDX instruments. Based on the results of the FTIR test, it is showed that the characteristics of CPAC contain functional groups O–H, C–H, C≡C, C=C, C–O/P=O with an impregnation ratio of 1:6 (w/w, carbon: H3PO4 30%) and an activation temperature of 500 °C for 60 minutes to be the optimal conditions in the production of CPAC. The CPAC has an amorphous crystalline character based on XRD analysis and a hollow (porous) surface based on SEM analysis. The results of the EDX test showed that CPAC consisted of the elements carbon (C), oxygen (O), nitrogen (N), phosphate (P), sodium (Na) with the respective percentages being 72.60%, 15.52%, 10 .32%, 1.09%, and 0.47% respectively.

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