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INDONESIA
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Published by Universitas Sriwijaya
ISSN : 25409395     EISSN : 25409409     DOI : -
Core Subject : Science, Social,
Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science
Indonesian Journal of Fundamental and Applied Chemistry (IJFAC) is an international research journal and invites contributions of original research articles as well as review articles in several areas of chemistry. The journal aims to publish refereed, high-quality research papers with significant novelty and short communications in all branches of chemistry. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines. IJFAC calls for papers that cover the following fields: Biochemistry Inorganic chemistry Physical chemistry Organic chemistry Analytical chemistry Applied Chemistry All papers are peer reviewed by at least two referees. Papers presented at conferences are peer reviewed and selected with the same standards as individually submitted papers. They therefore have the same archival value. Article should be submitted by the Online Submission Module at www.ijfac.unsri.ac.id or email to ijfac@unsri.ac.id
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 5, No 1 (2020): February 2020" : 5 Documents clear
Validation Method Rapid Test COD in Water and Waste Water compare with Standard Method as Quality Asurance in Integrated Testing Laboratory-FMIPA of Sriwijaya University Yuniar Yuniar; Maria Siswi Wijayanti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.18

Abstract

Portable COD test kit used for testing the COD because its low cost, less waste, contaminant free, efficient, simple and traceable to the international unit system. However the method has not yet accepted as a standard method, so it must be validated before applied in the laboratory according to the requirements of ISO / IEC 17025: 2017. In this study, the Rapid Test COD method vario Lovibond (M1) compared with the standard method APHA 5220D.4 (M2). The Rapid Test method modified used APHA reagents (M3) and vice versa (M4) were also studied. Evaluation based on precision values,  HorRat  whereas accuracy based on recovery value (R). Comparison of test results also conducted against Certified Reference Material values, and Z-score test. The precision test results for each method for both law range and high range gave HorRat values between 0.3-1.3 that meet the precision requirements. Accuracy testing also gave %R meeting the acceptance limit, even though M3 with the lowest %R is 94.17%. For comparison of results with CRM, the M3 method does not meet the acceptance limit, which is U∆ < ∆m. But the results of the Z-score Test all methods provide satisfactory accuracy
Study of Antioxidant Activities from Antihypertension Drug Plant of the Indralaya Area Seni Metasari; Muharni Muharni; Elfita Elfita; Heni Yohandini
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.22

Abstract

Ogan ethnic population in Indralaya, Ogan Ilir District, South Sumatra was known to have used several types of plants, there are Swietenia mahagoni, Averrhoa carambola, Syzygium samarangense, Musa acuminata, Nymphaea rubra, Syzygium polyanthum, and Andrographis paniculata for the treatment of hypertension. But, scientific information has not yet been found secondary metabolites that are responsible for providing these activities. The study began with the extraction of methanol from the seven types of plants using methanol as a solvent. Each thick extract was tested for its activity using the 1,1-diphenyl-1-picryllhydrazyl (DPPH) method. The extract which showed the highest activity (methanol extract) was subsequently carried out in vitro antihypertension test using the Angiotencyn Converting Enzyme (ACE) method. Antioxidant test results showed that the methanol extract from S. samarangense stem bark had the highest antioxidant activity with IC50 was 83.06 μg/mL. Antihypertension test of methanol extract from S. samarangense stem bark obtained IC50 ACE was 61.56 μg/mL. Based on the IC50 value, it shows that S. samarangense stem bark has potential as a source of antioxidant compounds as well as a source of antihypertension compounds. Keywords: Syzygium samarangense, stem bark, antioxidant, antihypertension
Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine Misriyani Misriyani; Tutik Setianingsih; Darjito Darjito
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.1

Abstract

Study of dyes adsorption (rhodamine B, methylene blue and carmine) by using mesoporous carbon synthesized at various carbonization time has been done. Purpose of this research was to understand influence of carbonization time to performance of the mesoporous carbon in dyes adsorption. In addition, adsorption performance of the mesoporous carbon and commercial carbon were compared. The adsorption test were conducted at conditions: 0.1 g of adsorbent, 25 mL of dyes solutions 100 ppm and shaking rate 125 rpm for 4 hour. Filtrate was used to determine remain concentration of the dyes with UV-visible spectrophotometry. Result of the research showed that the carbonization time from 1 to 3 hours  improved the adsorption, whereas from 3 to 5 hours decreased it. The best character of the mesoporous carbon was obtained at carbonization time of 3 hours with adsorption values of 96.43 ± 0.37 % for rhodamine-B, 38.80 ± 1.44 % for methylene blue and 48.51 ± 1.55 % for carmine. The adsorption values of the mesoporous carbon were 0.97 times for rhodamine B, 0.48 times for carmine, and 0.39 times for methylene blue compared with the commercial activated carbon.
Application of Nanosilica from Rice Husk Ash as Iron Metal (Fe) Adsorbent in Textile Wastewater Rusdianasari Rusdianasari; Muhammad Taufik; Yohandri Bow; Maryam Seyaski Fitria
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.7

Abstract

Heavy metals are considered hazardous to health if they accumulate excessively in the body. One way to remove iron metal ions by adsorption process uses adsorbents. In this study, removal of heavy metals such as ferrous metal (Fe) was adsorbed using an adsorbent in the form of nanosilica. Nanosilica is made from rice husk ash where rice husk ash contains 80-90% silica so that it can be utilized as a raw material in nanosilica synthesis. Synthesis of nanosilica was carried out using a solvent in the form of KOH with a variation of 1.5M concentration; 2.5M; 3.0M; 3.5M and 4.5M. The five types of nanosilica were applied to textile waste containing ferrous metal (Fe) with variations in a contact time of 5, 10, 15, 20, and 25 minutes. Waste containing iron metal that has been adsorbed was analyzed by atomic absorption spectrophotometry (AAS) to see the remaining iron content. From the analysis of AAS produced the smallest iron concentration of 0.186 ppm in nanosilica with 1.5 M KOH solvent. Nanosilica with 1.5M KOH solvent was characterized using a Scanning electron microscopy (SEM) -Energy Dispersive X-ray (EDX) tool to obtain a surface morphological size of 0.44 µm with 28.95% SiO2 content. 
Biodiesel Production from Waste Cooking Oil using Induction Heating Technology RA Nurul Moulita; Rusdianasari Rusdianasari; Leila Kalsum
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.13

Abstract

Kerupuk and kemplang industries produce at least 65 liters of waste cooking oil per production. One form of the application of science and technology in the field of new and renewable energy can be done in processing the waste oil from industrial production through the conversion process into one of the environmental friendly alternative fuels, biodiesel. Biodiesel production process can be carried out by various methods, such as utilizing induction heating technology. This technology has non-contact properties that do not interfere with the reactions that occur because of its application, which produces heat from the workpiece. This study uses waste cooking oil as raw material with variations in the molar ratios 1:3, 1:4, 1:5, 1:6, and 1:7. The analysis showed that the maximum biodiesel production was used of 1: 7 molar ratio with 86.95% yield, 0.86 gr/cm3 of density, 5.73 cSt of viscosity, 190oC of flash point, and 0.44 mg-KOH/gr of acid number. The using this ratio produces maximum yield and following SNI.

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