IJCA (Indonesian Journal of Chemical Analysis)最新文献_第2页

Inhibition of Steel Corrosion Rate in Sulfuric Acid Solution with Various Concentrations Using Soursop (Annona muricata L.) Leaf Extract Inhibitor 番荔枝对不同浓度硫酸溶液中钢腐蚀速率的缓蚀作用叶提取物抑制剂

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art1

Tsaniyah Wulandari, Asdim Asdim, Mas Ayu Elita Hafizah

{"title":"Inhibition of Steel Corrosion Rate in Sulfuric Acid Solution with Various Concentrations Using Soursop (Annona muricata L.) Leaf Extract Inhibitor","authors":"Tsaniyah Wulandari, Asdim Asdim, Mas Ayu Elita Hafizah","doi":"10.20885/ijca.vol6.iss2.art1","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss2.art1","url":null,"abstract":"Exploration of soursop leaf extract (Annona muricata L.) as one of the natural inhibitors against the corrosion process. The objective of this research is to determine the effect of the extract on inhibiting the corrosion rate of steel. The corrosion rate is determined by the decrease in the mass of the steel during immersion in various concentrations of sulfuric acid solutions, namely 0.01, 0.05, and 0.1 M, and optical microscopy will be used to analyze the corroded steel samples. This study consists of several stages: soursop leaf extraction, steel sample preparation, inhibitor solution and corrosive media preparation, immersion, and characterization. The extraction method is performed by maceration for 168 hours to obtain the extract. The highest corrosion inhibition efficiency obtained is 63.1% with the presence of 600 ppm inhibitor in 0.01 M sulfuric acid solution, while the lowest corrosion inhibition efficiency obtained is 14.8% with the use of 200 ppm inhibitor in 0.1 M sulfuric acid solution. The types of corrosion that occur on the steel surface are uniform corrosion and pitting corrosion.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132069842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing Chemical Oxygen Demand and Turbidity Levels in Laundry Waste Using Activated Carbon from Water Hyacinth Leaves 利用水葫芦叶中的活性炭降低洗衣废物中的化学需氧量和浊度

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art8

C. A. Riyanto, Nur Ayu Hidayati, Y. Martono

{"title":"Reducing Chemical Oxygen Demand and Turbidity Levels in Laundry Waste Using Activated Carbon from Water Hyacinth Leaves","authors":"C. A. Riyanto, Nur Ayu Hidayati, Y. Martono","doi":"10.20885/ijca.vol6.iss2.art8","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss2.art8","url":null,"abstract":"Lignocellulose compounds contained in water hyacinth leaves (WHL) (Eichhornia crassipes) can be used as raw material for the manufacture of activated carbon at a low and renewable rate. The ACWHL can be used as adsorbent for reducing a COD value and turbidity levels on laundry waste. The purpose of this study is to determine the best adsorption modelling of ACWHL on COD values and turbidity levels in laundry waste in kinetics and isotherm studies and determine the effectiveness of reducing a COD value and turbidity levels. The process of making ACWHL is carried out by carbonization at 400 °C for 1 hour, then activated using 30% H3PO4 at an impregnation ratio of 1:4 (w/w) for 24 hours and physical activation at 600 °C for 1 hour. The results showed that the adsorption of ACWHL on COD value and turbidity levels of laundry waste followed Freundlich isotherm and Elovich isotherm modelling with R2 values of 0.9535 and 0.9905, respectively. The modelling for adsorption kinetics of COD values and turbidity levels in laundry waste follows the Pseudo Second Order kinetics modelling. The effectiveness of ACWHL reduction in adsorption of COD value and turbidity levels of laundry waste was 80.76% and 64.71%.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124722675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Bamboo-based Activated Carbon through Physico-chemical Activation for Coal-runoff Wastewater Treatment 物化法合成竹基活性炭处理煤径流废水

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art6

Anggi Saputra, Oktaf Rina, Rahmat Hidayat, Murni Fitria, Syahdilla Anggiva Akhni, Ajis Purnomo, Aang Haryadi

引用次数: 0

Functional Group Identification and Toxicity of Piper crocatum Red Betel Acetone Extract against Artemia salina by Brine Shrimp Lethality Test Method 用卤虾致死试验法鉴定藏红花槟榔丙酮提取物的官能团及对盐蒿的毒性

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art5

Septaria Yolan Kalalinggi, N. Soekamto, Firdaus Firdaus

引用次数: 0

Microplastic Removal in Krueng Aceh River Water Using Ultrafiltration Membrane from Polyethersulfone Polymer (PES) 聚醚砜聚合物(PES)超滤膜去除Krueng Aceh河水中的微塑料

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art7

Haifa Dzihninafira, Abd Mujahid Hamdan, Fachrul Razi

{"title":"Microplastic Removal in Krueng Aceh River Water Using Ultrafiltration Membrane from Polyethersulfone Polymer (PES)","authors":"Haifa Dzihninafira, Abd Mujahid Hamdan, Fachrul Razi","doi":"10.20885/ijca.vol6.iss2.art7","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss2.art7","url":null,"abstract":"The Company's input pipes contained microplastics, per the preliminary test findings. While the water yield produced by PDAM Tirta Daroy contains 150 particles/L, the Tirta Daroy Drinking Water Area has 275 particles/L. Microplastics found in the water pose a major risk to living beings if they are consumed. This work aims to characterize the properties, flux, and polyethersulfone (PES) membrane rejection coefficient, which were made utilizing the phase inversion technique with a solvent and additives called N,N-dimethylformamide (DMF). In Sungai Krueng Aceh, titanium dioxide (TiO2) is utilized to filter out microplastics from the water. Results of Scanning Electron Microscopy (SEM) examination of Membrane Morphology demonstrate that the resulting membrane is an asymmetrical membrane of two layers, the upper layer relatively thin and the lower layer porous. When compared to the PES membrane when it was 15% DMF/TiO2, the 20% DMF/TiO2 membrane exhibits a finger-like cross-sectional structure called a macrovoid) with more and larger numbers. Analysis of the microplastic rejection coefficients proved the effectiveness of PES, DMF, and TiO2 membranes in removing microplastics. Results of tests on the effectiveness of rejecting microplastics after undergoing process filtration with a microplastic rejection coefficient of 94% and 14.2 particles/L utilizing a 20% PES/DMF/TiO2 membrane Performance of PES membranes: The PES membrane with 20% DMF/TiO2 has a water flux of 0.467 L/m2.hour compared to 15% DMF/TiO2 0.733 L/m2.hour. This study's findings on membrane Ultrafiltration have the potential to be used as a water filter standard in PDAM.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct Cu, Fe, and Ni Ions Multicomponent Analysis Using UV-Vis Spectrophotometric Method 紫外可见分光光度法直接分析铜、铁、镍离子多组分

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art2

S. Suprapto, Y. Ni'mah

{"title":"Direct Cu, Fe, and Ni Ions Multicomponent Analysis Using UV-Vis Spectrophotometric Method","authors":"S. Suprapto, Y. Ni'mah","doi":"10.20885/ijca.vol6.iss2.art2","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss2.art2","url":null,"abstract":"This study presents a direct multicomponent analysis method using UV-Vis spectrophotometry to determine Cu(II), Fe(III), and Ni(II) ion content without prior complexation or separation. Single and multivariate regression was used to predict metal ion content, and the resulting model was trained and validated using a dataset of 25 multi-component samples. The mean recoveries for Cu(II), Fe(III), and Ni(II) using linear and ridge regression based only on absorbance at 805 nm were 99.97% and 101.6%, 95.42% and 95.65%, and 99.43% and 99.99%, respectively, for the 20% test data. The mean recoveries for Cu(II), Fe(III), and Ni(II) using linear and ridge regression based only on absorbance at 805 nm were 92.27% and 95.03%, 125.3% and 124.11%, and 104.15% and 105.52%, respectively, for the test solution outside of the training data. These results demonstrate the effectiveness of the multivariate UV-Vis spectrophotometric method for the simultaneous determination of Cu(II) and Ni(II) in multicomponent samples, which meets the analysis standard and can be successfully applied. Finally, the study sheds light on the influence of spectral interference on the accuracy of regression models. It highlights the importance of carefully selecting the wavelengths used as predictors in such models. This can have significant implications for developing and validating analytical methods, particularly in cases where multiple analytes were present in a sample.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125536488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of Fat in Pork Using Fourier Transform Infrared Spectrum and GC-MS 傅里叶变换红外光谱与气相色谱-质谱联用技术鉴别猪肉中的脂肪

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art10

Yulirohyami Yulirohyami, Vivin Maulidatunnisa, Dinda Permata Pusparani, Bagas Prasetyo

{"title":"Identification of Fat in Pork Using Fourier Transform Infrared Spectrum and GC-MS","authors":"Yulirohyami Yulirohyami, Vivin Maulidatunnisa, Dinda Permata Pusparani, Bagas Prasetyo","doi":"10.20885/ijca.vol6.iss2.art10","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss2.art10","url":null,"abstract":"Halal food safety issues receive serious attention. Methods for analyzing contamination of non-halal ingredients, such as lard, must be developed to assist in the halal authentication process for food. This study was conducted to compare the fat profile of pork thighs using FT-IR and GC-MS. The pork is dried in the oven and then extracted using n-hexane. The resulting fat was characterized by FT-IR. Determination of fatty acids was carried out by GC-MS using a derivatization technique. Based on the results of the study showed that the infrared pattern of lard can be identified from the difference in absorption intensity. Pork fat has a higher unsaturated fatty acid content than beef and chicken. Infrared spectra can confirm the presence of -C=C- bonds at 3005, 1745, 1116, 1550, and 722 cm-1. The FTIR data shows that there are larger unsaturated fatty acid groups in pork fat than in beef and chicken fat. This procedure is a non-destructive method that can be carried out quickly, and cheaply, and can be developed into a routine procedure for halal authentication of food. Based on the results of unsaturated fatty acid testing with GC-MS it can show the content of oleic acid (C18:1) contained in pork. The results of mapping the content of free fatty acids in pork can be used to complete halal authentication data easily and quickly.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121070244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quality Analysis of Cloth Masks: Study of Material Types on Physical, Chemical, and Antibacterial Properties 布口罩的质量分析:材料类型的物理、化学和抗菌性能的研究

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-09-01 DOI: 10.20885/ijca.vol6.iss2.art3

Sayekti Wahyuningsih, A. H. Ramelan, Selfi Handayani, N. Wiyono, Sentot Budi Raharjo, Agus Supriyanto, Windy Ayu Lestari, Retno Hartati, Rahmat Hidayat

引用次数: 0

Effect of Dolomite Addition on The Performance of Palm Oil Mill Fly Ash for Methylene Blue Adsorption 添加白云石对棕榈油磨飞灰吸附亚甲基蓝性能的影响

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-03-16 DOI: 10.20885/ijca.vol6.iss1.art7

E. Pelita, Rita Youfa, Desniorita Desniorita, Anang Baharuddin Sahaq, Miftahurrahmah Miftahurrahmah, Resi Levi Permadani, Jerry Jerry

{"title":"Effect of Dolomite Addition on The Performance of Palm Oil Mill Fly Ash for Methylene Blue Adsorption","authors":"E. Pelita, Rita Youfa, Desniorita Desniorita, Anang Baharuddin Sahaq, Miftahurrahmah Miftahurrahmah, Resi Levi Permadani, Jerry Jerry","doi":"10.20885/ijca.vol6.iss1.art7","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss1.art7","url":null,"abstract":"The use of palm oil mill fly ash (FA) as a low-cost adsorbent is one of the solutions for handling FA waste. In this study, the addition of dolomite is expected to improve the adsorbent performance. The aim of this study was to investigate the optimum FA-dolomite adsorbent composition and operating conditions for methylene blue adsorption. Different parameters were studied to optimize adsorption process such as the amount of dolomite, methylene blue flow rate, bed height and number of trays. FA-dolomite was converted into nano-adsorbent by sol-gel method which was coated on zeolite surface. Nano-adsorbents were characterized by XRF, FTIR, XRD and SEM. The adsorption capacity was tested by Spectrophotometer UV-Vis. XRF characterization showed that FA had the highest SiO2 content of 58.15%, while dolomite contained CaO of 52.72%. FTIR characterization detected the groups of Si-O-Si, Si-O-Al, Ca-O and Si-O. XRD characterization showed the average crystalline size of FA-dolomite 2% adsorbent was 28.56 nm and SEM characterization showed fine pores on the adsorbent surface. The highest adsorption efficiency obtained at FA-dolomite 2% was 97.364% and the lowest obtained at FA-dolomite 8% was 13.16% with a flow rate of 500 ml/h, adsorbent height of 9 cm and 3 trays. The greater the amount of dolomite added, the absorption efficiency decreases.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117175016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of Resistant Starch from Avocado Seeds (Persea americana) through Streptomyces sp. AB8 Fermentation and Autoclaving-Cooling Variations 链霉菌AB8发酵产鳄梨种子抗性淀粉及高压灭菌-冷却变化研究

IJCA (Indonesian Journal of Chemical Analysis) Pub Date : 2023-03-16 DOI: 10.20885/ijca.vol6.iss1.art3

Achmad Arifiyanto, Siti Inah, Indah Sukma Ningsih, C. N. Ekowati, undjung Tripeni Handayani

{"title":"Production of Resistant Starch from Avocado Seeds (Persea americana) through Streptomyces sp. AB8 Fermentation and Autoclaving-Cooling Variations","authors":"Achmad Arifiyanto, Siti Inah, Indah Sukma Ningsih, C. N. Ekowati, undjung Tripeni Handayani","doi":"10.20885/ijca.vol6.iss1.art3","DOIUrl":"https://doi.org/10.20885/ijca.vol6.iss1.art3","url":null,"abstract":"Agricultural waste with a high starch content potentially serves as a source of resistant starch. The avocado seed has not been explored much and is often thrown away as waste in consuming avocados. Resistant starch has properties and functions as dietary fiber and has advantages as a prebiotic. This study aims to determine the effect of fermentation treatment using Streptomyces sp. AB 8 and variations in the number of pressure-cooling heating cycles to increase avocado seed-resistant starch. The research phase consisted of pre-treating the avocado seeds and fermentation by Streptomyces sp. AB 8 followed by a pressure heating-cooling stage with 0, 1, 2, and 3 cycles. Concerning modified starch, this study also measured levels of starch, amylose, amylopectin, and resistant starch. Digestion test using Lactobacillus sp. by viewing the clear zone around the colonies after 48 hours to evaluate the digestibility of resistant starch. The results of this study indicate that the fermentation treatment by Streptomyces sp. AB 8 and pressure-cooling heating can increase the levels of resistant starch in avocado seeds. Fermentation treatment with two cycles of heating-pressure-cooling (S1) produced the best resistant starch content of 7.51% and had the highest enzymatic index of 2.48 ± 0.45.","PeriodicalId":215410,"journal":{"name":"IJCA (Indonesian Journal of Chemical Analysis)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124829620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1