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INDONESIA
Indonesian Journal of Chemistry and Environment
Published by Universitas Negeri Yogyakarta
ISSN : -     EISSN : 25993186     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science
Indonesian Journal of Chemistry and Environment (IJCE) is a journal which covers all the field of chemistry and environment, both experimental and theoretical aspects. Regular papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. Authors are encouraged to submit complete original and unpublished works, which are not under review and considered to be publish in any other journals.
Arjuna Subject : -
Articles 22 Documents
 1   2   3 
SYNTHESIS OF SILICA GEL FROM GLASS WASTE AND ITS APPLICATION ON SOLID PHASE EXTRACTION OF Pb(II) CATIONS Novisatri, M.B.; Priyambodo, E.; Sunarto, S.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2018): June 2018
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i1.19576

Abstract

Waste glass is one of inorganic wastes which are significant in Indonesia and has not been handled properly. The high content of SiO2 in the glass waste allowed to be processed into silica gel through sol-gel methods. In this research, waste glass was destructed into micro size particles. After that, it was reacted with a sodium hydroxide solution, thus forming a solution of sodium silicate. Silica gel was obtained by reacting sodium silicate with hydrochloric acid. After a silica gel obtained, silica gel is dried and then characterized using infrared spectrophotometry. Using a glass column, silica gel is used as solid phase on solid phase extraction in terms of preconcentration of Pb(II) cations. Based on this research, preconcentration of Pb(II) cations by solid phase extraction using silica gel from glass waste is an effective method.
Atomic Absorption Spectrophotometric Method for Magnesium and Iron Determination in Goat Milk Powder Kusumaningtyas, H.; Febiana, H.; Septiani, L.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2018): June 2018
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i1.19586

Abstract

This research aims to determine the levels of magnesium and iron in goat milk powder. The method of this research was atomic absorption spectrophotometry. The research subject is goat milk powder while the research object is the amount of magnesium and iron in goat milk powder. Before analyzing, the first step is removing organic substances in the sample that could interfere the analysis by dissolved it in concentrated nitric acid and heated. Based on the measurement using atomic absorption spectrophotometry method, absorbance and concentration of magnesium and iron in the sample were obtained. The analysis showed that the levels of magnesium and iron in the sample were 0.00317 mg/g and 0.02177 mg/g.
Analysis of Cyanide Content on Yams Using Spectrophotometry Methods Widiastuti, Vany; Ernawati, Erlin; Fatmadewi, Vita; Anindyajati, Saraswati; Faradina, Shaaliyah Novita
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v1i1.20784

Abstract

This study aims to determine whether or not cyanide content in various species of yams in the District of Tempel, Sleman, Yogyakarta. The samples were cassava (Manihot esculenta Crantz), water yam (Discorea Alata), intoxicating yam (Dioscorea hispida Dennst), canna lilly (Canna discolor L), and taro (Colocasia esculenta). The qualitative test was performed by cementing the sample with aquadest and 10% tartrate acid and then covering the erlenmeyer that containing the sample with dry filter paper immersed in saturated picric acid and dampened with 8% sodium carbonate and then heating it. Quantitative tests were performed using a spectrum 20 with a wavelength of 590 nm. This quantitative test is based on forming a blue hydrindantin complex at pH > 12 when cyanide is reacted with a ninhydrin complex. The results showed that in qualitative test, sample containing cyanide was indicated by the change of color of filter paper from yellow to brownish red. Quantitative results show that cyanide contained in sample as varies levels. The cyanide levels through the various species of yams were 0.1098 mg / 100g for cassava 0.049 mg/100 g for water yam, 0.1394 mg/100g for intoxing yam, 0.0896 mg/100 g for canna lilly and 0.0680 mg / 100g for taro.
Content Analysis Of Vitamin C In Fresh And Processed Moringa Trees By Spectrophotometry And Iodometric Titration Methods Sarah, S.; Murthy, R.S.; Sugiarto, A. P.; Sariyati, S.; Priyambodo, E.
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v1i1.18816

Abstract

The aims of this research were to examine the vitamin C content found in fresh and processed moringa trees and to know the method/ stage used to analyze the vitamin C content found in fresh and processed moringa trees. This research uses two methods namely spectrophotometric method and iodometry titration method. Initial stage prepare the sample of moringa, which were moringa leaf, moringa stem and moringa seed.  The results showed that at the wavelength of 600 nm and after the iodometric titration, all the moringa samples (leaves, stems and seeds) contain vitamin C. Both of this two methods, spectrophotometry and iodometric titration, is able to analysis vitamin C in Morianga trees.
Determination of Iron (Fe) Species in Samples of Canned Packaging Beef Haryanti, Septi Dwi; Dzawinnuha, Hannuna; Adika, Vanadia
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v1i1.20785

Abstract

The research aims to know the content of iron metal (Fe) in samples of canned packaging beef. The destruction of the samples prior to breaking the metallic bond with organic compounds in the sample, making them easier to identify the metal content to be analyzed. The analysis of metal content of iron has been done by using Atomic Absorption Specthrophotometer. The level of iron metal contained in beef samples of A brand packaging is 40.0570 mg/kg, in B brand packaging is 25.5175 mg / Kg and in the  C brand packaging 22.9600 mg/Kg. When compared to the iron metal threshold in food as contained in SNI 01-7387-2009, then the sample of beef packaging for B and C brand is still safe because the iron content is still below 30 mg/kg. Meanwhile,  the beef corned for A brand is not safe because it is higher than 30 mg/kg.
Analysis of Cadmium Metal in Facial Moisturizing Cream with Atomic Absorbtion Spectrophotometry Method Ardhya, Hilda; Wardah, Annisa Chiyarotul; Rachmawati, Pipit
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v1i1.20783

Abstract

This study aims to determine the concentration of cadmium (Cd) metal content in various facial moisturizing creams with atomic absorbtion spectrophotometry (AAS). Samples were analyzed in the form of 6 brands of facial moisturizer cream that sold in market and selected randomly. The cream samples were destructed by wet destruction method. Next, the samples of destruction result were analyzed by atomic absorbtion spectrophotometry method with wavelength about 228.8 nm to determine the concentration of cadmium.  The results of this research showed that there was cadmium (Cd) metal content in the 2 samples of facial moisturizing cream that analyzed. Cadmium metal concentration on brand A is 0.1389 ± 2.7817 x 10-3 ppm and and brand B is 0.1321 ± 2.6468 x 10-3 ppm. Based on this result, the moustirizing creams are safe to use due to the BPOM regulation
Analysis of Total Reducing Sugar Content, Acidity Value, and Hydroxymethylfurfural (HMF) Content of Various Honey Types Ayubi, Agrib Nur
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v1i1.20786

Abstract

The aims of this research are to determine the total reducing sugar content, acidity value, and hydroxymethylfurfural (HMF) content of various honey types in Special Region of Yogyakarta and Central Java. Those types sample of honey are sengon, randu, kelengkeng, rambutan, and kopi honey from several places in Yogyakarta and Central Java. This research using analytical method, there are iodometry titration, acid-base titration, and UV-Vis spectrophotometry. The result of total reducing sugar content from sengon honey 74.40%, randu honey 61.42%, kelengkeng honey 62.07%, rambutan honey 88.14%, and kopi honey 87.04%. Acidity value of sengon honey 71.33 mL/Kg, randu honey 116.67 mL/Kg, kelengkeng honey 41.33 mL/Kg, rambutan honey 32.00 mL/Kg, and kopi honey 70.00 mL/Kg. HMF content of sengon honey 14.7 mg/Kg, randu honey 39.7 mg/Kg, kelengkeng honey 45.2 mg/Kg, rambutan honey 47.5 mg/Kg, and kopi honey 38.8 mg/Kg. In spite of the result of this analysis is more than the number of Indonesian National Standard of honey, those honeys are still good and doesn’t mean there are forbidden to consume it.
Analysis of Free Fatty Acid in Frying Oils of Various Foodstuffs Setianingsih, A.; Febrianto, F.; Riyani, A.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2018): June 2018
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i1.19454

Abstract

Cooking oil is one of the basic human needs as food processing media. Repeated use of cooking oil by heating at high temperature will produce free fatty acid levels. This study aims to determine the levels of free fatty acids in frying oils of various foodstuffs that is chicken, catfish, and flour with acid base titration method.  The study population was frying oils of various foodstuffs of 0, up to 5th. The results of fatty acid levels in the repeated use of chiken (sampel A), catfish (sample B) and flour foodstuffs shows the Fatty Acid levels exceed safe limits set by SNI 7709:2012. The oil before was used = 0.24% and on sample A: the oil of first frying (A1) = 0.49%,  5th frying (A5) = 0.73%. ALB sample B: first frying (B1) = 0.49%, 5th frying (B5) = 0.68%. ALB sample C: first frying (C1) = 0.49%, 5th frying (B5) = 0.77%. The increase of free fatty acid was influeced of the oil was many used to frying because level water in foodstuffs.
ADSORPTION OF CR ON LIQUID WASTE OF TANNERY INDUSTRY USING BANANA PEEL CHARCOAL IN VARIOUS PH AND TIME ACTIVATION Atmasari, A. D.; Amaliya, F.; Puspitasari, L.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2019): June 2019
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.253 KB) | DOI: 10.21831/ijce.v2i1.30292

Abstract

The purpose of the research is to determine the effect of activation time of banana peel charcoal on the adsorption capacity of Cr metal's tannery industry. Banana peel charcoal is made by carbonization process followed by activation using HCl solution with varying time. The activated charcoal with optimum activation time is used to determine the optimum pH of tannery waste on adsorption Cr metal. Banana peel as much as 600 grams then carbonized can form 42 grams of banana peel charcoal. The concentration of Cr metal initial that contained in tannery waste was 292.1 ppm. The optimum activation time is 1 hour, with decreasing Cr metal as much as 141.87 ppm using 1 gram of banana peel activated charcoal. While the pH variation of waste does not provide a significant difference.
UTILIZATION OF NATURAL COAGULANT SUBSTANCE (TAMARIND AND WINGED BEAN SEED) ON THE QUALITY OF TOFU WASTEWATER IN MUNTILAN, MAGELANG Elpani, S. E.; Gunawan, M. J.; Aviventi, E.; Sabila, R. A.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2019): June 2019
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.171 KB) | DOI: 10.21831/ijce.v2i1.30294

Abstract

The aim of this study is to determine the effect of various mass in tamarind and winged bean seeds on pH, TDS, and COD in tofu factory wastewater. The research was conducted at the Chemistry Research Laboratory of FMIPA UNY in December 2018.  The results showed that the addition of various mass in tamarind and winged bean seeds as much as 7, 9, and 11 grams of tofu factory wastewater had an effect on pH which increased from the initial condition of 2.5 to 2.6; 2.7; 2.8 in tamarind seeds, and 2.8; 2.9; 3.0 on winged beans. The COD test increased from the initial condition of 6619.20 mg / L to 7312, 64; 7880, 00; 8195.20 mg / L in tamarind seeds, and 9140.80; 10464.64; 9329.92 mg / L in winged bean seeds which have decreased again in the addition of 11-gram coagulant substance mass. TDS test has increased from the initial conditions of 1512 mg / L to 1715; 1736; 1848 mg / L in tamarind seeds, and 1890; 1988; 1855 mg / L in winged bean seeds. 

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