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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 Authors are encouraged to submit complete original and unpublished works, which are not under review and considered to be publish in any other journals.
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Articles 4 Documents
 1 
Search results for , issue "Vol 2, No 2 (2019): December 2019" : 4 Documents clear
Analysis of Lead (Pb) and Cadmium (Cd) in Whitening Creams using Atomic Absorption Spectroscopy Agustina, A. T.; Primadi, M. P.; Randhanugraha, H.; Khotimah, K.; Luriyani, I.
Indonesian Journal of Chemistry and Environment Vol 2, No 2 (2019): December 2019
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i2.38187

Abstract

This research aims to determine the concentration of Lead (Pb) and Cadmium (Cd) metals contained in face whitening creams that are sold in store around Sleman, Yogyakarta. The analysis concentration of Pb and Cd levels in those whitening creams carried out using Atomic Absorption Spectrophotometer (AAS) at Chemistry laboratory of Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta. We used 5 different face whitening cream samples (here after indicated by sample A, B, C, D, E) that taken randomly with the range price of thousand rupiahs. The results of analysis showed that in the sample A contains of -0.729 ppm Pb and 1,199 ppm Cd; sample B covers 0,017 ppm Pb and 1,274 ppm Cd; in the sample C consists of 1,082 ppm Pb and 1,254 ppm Cd; in the sample D contains a total of 1.242 ppm Pb and 1.215 ppm Cd; and in the sample E consists of -0.409 Pb and 1.232 ppm Cd. The results of this research are useful as the bases of their heavy metal concentrations, thus the possibilities of counterfeiting of the products ingredients can be avoided. An effort should be made in order to tell the customers about the harmful effects of over consumption of the face whitening cream with heavy metal acumulations in the body.
Analysis of Iodine Level (KIO3) based on the Formation of Amylum-Iodine Complex using UV-Vis Spectroscopy Krisdiyanti, A.; Adzillina, R.; Sani, Z. A.; Kumalasari, A. A.
Indonesian Journal of Chemistry and Environment Vol 2, No 2 (2019): December 2019
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i2.38189

Abstract

Iodine is an important component that needed by the body in the synthesis of thyroid hormones in order to maximize humans’ growth and development. Besides, iodine also plays a role in the regulation and metabolism system in the human body. Iodine Deficiency Disorders (IDD) is one of the nutritional problems which is an inhibiting factor in the development of human resources because it can cause disruption of mental development and human intelligence. Iodine in food is found from table salt, it found in the form of KIO3 with a standard level of iodine in table salt that is 30ppm-80ppm. This research aims to determine the iodine levels in the four kinds of table salt using spectrophotometric methods based on the formation of the starch iodine complex. The formation of the starch iodine complex performed by reacting I- with the oxidizer IO3- in an acidic atmosphere with starch indicator. The resulting blue color was analysed by visible spectrophotometry and produce absorbance data. The measured iodine content is equal to samples A, B, C, and D showing results less than 30 ppm so it can be concluded that iodine in table salt still does not meet the SNI standards that should be around 30ppm-80ppm
Adsorption of Ammonium Ion from Tofu Industrial Liquid Waste by Coconut Shell-Activated Carbon Adha, C. N.; Istiqomah, U.; Safitri, A. W.; Tarmini, T.
Indonesian Journal of Chemistry and Environment Vol 2, No 2 (2019): December 2019
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i2.38190

Abstract

Liquid waste from tofu industry will flow or discharge into water. It causes pollution which is characterized by unpleasant odor. If this continues, it can damage the environment and threaten the health of the people who inhale the unpleasant odor. Activated carbon is a carbon that is able to adsorb in the liquid phase or gas phase.  Activated carbon is the best adsorbent in the adsorption system. The material for activated carbon comes from animals, plants, and waste or minerals that contain carbon. Coconut shell is an ingredient that can be made into activated carbon. Activated carbon from coconut shell has many benefits one of them can adsorb liquid waste from tofu industry. This study aims to examine the ability of coconut shell to adsorben, that have been activated by K2CO3 or HCl activator. In this study given the variation of activated charcoal mass and contact time variations to determine the effect on the ability of activated coconut shell charcoal adsorption on ammonia content in Liquid waste from tofu industry. The results of this study are the greater the mass of activated charcoal and the longer the contact time, the greater the ammonia absorbed by activated charcoal, which indicates that the percent decrease in ammonia concentration is greater
The Effect of Activators againts the Ability of Active Charcoal from Nila Fish (Oreochromis niloticus) to Adsorp Cd(II) and Pb(II) Ions Santi, M. T.; Banihabib, I.; Isnaningrum, M.; Miranda, I. B.
Indonesian Journal of Chemistry and Environment Vol 2, No 2 (2019): December 2019
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i2.38192

Abstract

The purpose of this research is to how to make the active charcoal of Nila fishbone and to know effect of the variety activators against the ability of charcoal from nila fishbone waste in absorbing Cd(II) and Pb(II) ions. This research included in the experimental research. Active charcoal making process through 5 stages, namely: sampling, sample processing, the process of carbonation, the activator, and the process of neutralization. Sampling (Nila fishbone) in the restaurant, sample processing in the form of a fishbone drying in the sunshine, the process of carbonation by injecting bone for the furnace and sifted using a mess. The process of with activator HNO3 and HCl, also neutralization by making active charcoal to a neutral pH. Then, specify a contact time of 30, 60, and 90 minutes. The filtrate is further tested by Atomic Absorption Spectrophotometer (AAS) tool to know the adsorption of lead and cadmium ions. The results showed effect of HCl activator on Cd2+ and Pb2+ ions is more effective than HNO3 activator.

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