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All Journal Indonesian Journal of Chemical Analysis (IJCA) Jurnal Pengabdian Kepada Masyarakat SEWAGATI
Yatim Lailun Ni'mah
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Other

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The Identification of Acetic Acid-Ethanol Mixture Using Gas Sensor Array and Ensemble Regression Suprapto, Suprapto; Yatim Lailun Ni'mah; Harmami, Harmami; Ulfin, Ita; Ardiyanti, Annisa
Indonesian Journal of Chemical Analysis (IJCA) Vol. 7 No. 1 (2024): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol7.iss1.art1

Abstract

Identification of acetic acid-ethanol mixtures using a commercial gas sensor array equipped with ensemble regression has been carried out. The gas sensor analysis was simple, rapid, and fast since it did not require any sample preparation. A quantitative analysis of the acetic acid-ethanol mixture was carried out to determine the sensitivity and selectivity of the sensor in distinguishing the concentration of the acetic acid and ethanol mixture. This study focuses on the coefficient of determination of 80% of the calibration data set and recovery of 20% of the testing data set. The models showed excellent performance,specifically, the Bagging and Random Forest r2 for the ethanol calibration data reached 0.91 and 0.94, respectively. The corresponding ethanol test recoveries were 99.95% and 97.84%, indicating the robustness of the model in accurately predicting ethanol concentration. Acetic acid test recoveries were 100.56% and 101.38% with r2 of 0.89 and 0.93 for Bagging and Random Forest regression, respectively. Hence, the commercial gas sensor array equipped with ensemble regression can be applied to the quantification of the acetic acid – ethanol mixture and demonstrate opportunities for the practical use of this gas sensor array in analyzing real samples, i.e. human breath or environmental monitoring samples.
PEMANFAATAN LAHAN TIDAK PRODUKTIF DI DESA DURENAN, SIDOREJO, MAGETAN UNTUK BUDIDAYA SAWI DAN KALE MENGGUNAKAN METODE HIDROPONIK APUNG Suprapto; Yatim Lailun Ni'mah; Ita Ulfin; Harmami Harmami; Grasianto Grasianto; Kartika Anoraga Madurani
Sewagati Vol. 5 No. 1 (2026): SEWAGATI
Publisher : Fakultas Teknik dan Informatika Universitas PGRI Mahadewa Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59819/sewagati.v5i1.6010

Abstract

Keterbatasan lahan produktif di pedesaan menuntut adanya inovasi budidaya pertanian yang dapat memanfaatkan lahan tidak produktif. Penelitian ini bertujuan memanfaatkan lahan pekarangan tidak produktif di Desa Durenan, Kecamatan Sidorejo, Kabupaten Magetan, untuk budidaya sawi (Brassica juncea) dan kale (Brassica oleracea var. sabellica) menggunakan metode hidroponik apung. Tahapan kegiatan meliputi persiapan media pembenihan, pembangunan greenhouse dan bak hidroponik, pemindahan bibit ke sistem rakit apung, serta sosialisasi metode kepada masyarakat. Hasil menunjukkan bahwa sawi dapat dipanen pada umur 25–35 hari dengan bobot rata-rata 150–200 g/tanaman, sedangkan kale dipanen pada umur 35–40 hari dengan bobot 200–250 g/tanaman. Kegiatan ini berhasil meningkatkan produktivitas lahan yang semula terbengkalai serta membuka peluang pemberdayaan masyarakat desa melalui pertanian modern berbasis hidroponik.
Co-Authors Ardiyanti, Annisa Grasianto Grasianto Harmami Harmami Harmami Harmami Ita Ulfin Ita Ulfin Kartika Anoraga Madurani Suprapto Suprapto Suprapto