Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Jurnal Pengelolaan Laboratorium Pendidikan Jurna Beta Kimia
Erlangga, Manasye
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Penentuan Kualitas Kaolin sebagai Prekursor Sintesis Zeolit pada Kegiatan Praktikum Ismail, Rohmat; Erlangga, Manasye; Himawan, Ari; Afiah, Givana Indah Nurul
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 7 No. 2, Juli 2025
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.7.2.81-90

Abstract

Zeolite synthesis has attracted the attention of researchers today because of the functional properties of zeolites. The zeolite synthesis process can be influenced by various factors, one of which is the quality of the zeolite precursor. One of the precursor materials for zeolite synthesis is kaolin. This study aims to determine the quality of three kaolin brands used as precursors for zeolite synthesis in practicum activities. The quality of kaolin was assessed through gravimetric loss on ignition testing and analysis of the metal oxide composition using an X-ray fluorescence (XRF) spectrometer. The loss on ignition analysis results for kaolin A, kaolin B, and kaolin C samples were 7.94%, 7.87%, and 6.52%, respectively. The XRF analysis results, which included the compositions of SiO2, TiO2, Al2O3, Fe2O3, CaO, MgO, K2O and Na2O, were as follows: for kaolin A, 57.58%, 0.78%, 19.69%, 5.83%, 0.23%, 1.03%, 0.99% and 0.11%; for kaolin B, 56.30%, 0.80%, 21.30%, 7.19%, 0.08%, 0.52%, 1.19% and 0.16%; and for kaolin C, 68.03%, 0.80%, 14.40%, 5.08%, 0.32%, 0.94%, 0.95% and 0.01%. The two analysis results showed that the three kaolin samples had met the requirements as zeolite precursors based on the range of reference specification values: loss on ignitation<10%, SiO2 content 50–70%, TiO2 <1%, Al2O3 8.5–30.5%, Fe2O3 2–15.5%, CaO <1.68%, MgO 0.48–1.19%, K2O <3.6%, and Na2O <0.35%. The ensuing results furnish recommendations for the zeolite synthesis practicum, to select the most suitable kaolin type.
Optimization of Extraction and Measurement Methods in the Determination of Total Iron (Fe) Content in Anti-Anemia Multivitamin Capsule Samples Ismail, Rohmat; Erlangga, Manasye; Wahyuningtyas, Irma; Prihatini, Esti
Jurnal Beta Kimia Vol 5 No 1 (2025): Volume 5 Number 1, May 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i1.21161

Abstract

Iron (Fe) is a transition metal that plays a critical role in human life, particularly as a micronutrient. The objective of this study is to optimize and ascertain the most appropriate method for measuring the total Fe content of anti-anemia multivitamin capsule samples, thereby ensuring the accuracy of the measurement results. The determination of total Fe content can be achieved through two metal extraction methods, namely wet digest and dry ashing methods, and two metal measurement methods, namely UV-Vis spectrophotometer and atomic absorption spectrophotometer (AAS). The findings revealed that the measurement of total Fe content by UV-Vis spectrophotometer through the dry ashing extraction method yielded a lower value (20.92 ± 0.29 mg/g) compared to the wet digest method (67.91 ± 0.83 mg/g). Furthermore, the Fe content determined by AAS analysis exhibited a reduced value in the dry ashing extraction method (1.42 ± 0.02 mg/g), while the wet digest extraction method yielded a substantially higher value (72.91 ± 4.12 mg/g). Statistical tests with the Duncan method revealed that the wet digest extraction method with UV-Vis spectrophotometer measurements is the most effective method for determining the total Fe content, with a significance level equivalent to the theoretical reference value (67.85 ± 0.03 mg/g).
Co-Authors Afiah, Givana Indah Nurul Himawan, Ari Ismail, Rohmat Prihatini, Esti Wahyuningtyas, Irma