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All Journal QUANTUM: Jurnal Inovasi Pendidikan Sains
Noor Elfa
Program Studi Pendidikan Kimia FKIP ULM
Chemistry Education Physics

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PENGUJIAN EFEKTIVITAS ALAT DESTILASI FRAKSINASI DALAM PRODUKSI ALKOHOL DARI AIR TAPE LOKAL SEBAGAI BAHAN DASAR PEMBUATAN HAND SANITIZER Noor Elfa; Rasyidah Rasyidah
QUANTUM: Jurnal Inovasi Pendidikan Sains Vol 12, No 1 (2021): April 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/quantum.v12i1.9343

Abstract

Awal pandemi Covid-19 terjadi kelangkaan bahan baku hand sanitizer yaitu alkohol. Alkohol merupakan bahan dasar yang digunakan dalam pembuatan hand sanitizer Alkohol dipisahkan dengan destilasi fraksinasi menggunakan kolom. Pada kolom terjadi pemanasan secara bertahap dengan suhu yang berbeda di setiap platnya untuk pemurnian destilat dibawahnya. Penelitian ini bertujuan untuk; (1) mengetahui kefektifan penggunaan jenis kolom vigreux dan kolom hemple pada destilasi fraksinasi air tape ketan dan singkong (2) mengetahui persentase kadar alkohol maksimal dari kedua air tape tersebut (3) mengetahui daya hambat hand sanitizer terhadap bakteri Staphylococcus aureus dan Escherichia coli. Penelitian ini menggunakan metode eksperimental di laboratorium menggunakan air tape ketan dan singkong Gambut. Data dianalisis dua faktor yaitu jenis kolom dan jenis air tape dengan uji Normalitas, jika data berdistribusi normal dilakukan uji parametrik One Way Anova, jika tidak berdistribusi normal dilakukan uji non paramterik Kruskal-Wallis. Hasilnya adalah jenis kolom destilasi dan jenis air tape berpengaruh signifikan terhadap persentase kadar alkohol. Kolom vigreux lebih efektif dibandingkan kolom hemple pada proses destilasi air tape, destilasi air tape singkong dengan kolom vigreux memberikan rendemen 15,95 % per 1000 mL air tape singkong dengan kadar alkohol 90,44 % sedangkan air tape ketan memberikan rendemen 9,18 % per 1000 mL air tape ketan dengan kadar alkohol 87,91 %. Aktivitas antibakteri alkohol hasil destilasi dari air tape ketan dan singkong memberikan pengaruh bermakna dalam menghambat pertumbuhan bakteri Escherichia coli. Dengan demikian kolom vigreux lebih efektif dibandingkan kolom hemple dalam produksi alkohol.
The Potential of Plant Starch as A Natural Indicator in Practice of Iodometric Titration Noor Elfa; Arif Sholahuddin; Suyidno Suyidno
QUANTUM: Jurnal Inovasi Pendidikan Sains Vol 16, No 2 (2025): Oktober 2025
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/quantum.v16i2.22457

Abstract

Iodometric titration generally uses synthetic starch as an endpoint indicator. This indicator is non-biodegradable, environmentally unfriendly, and relatively expensive. An alternative that can be offered is the use of natural starch from local plants as a more sustainable indicator. This study aims to test the potential of starch from various plant sources as a natural indicator in iodometric titration. Analysis of copper levels using starch indicators from four local plants showed varying values, namely sticky rice 0.50 g, purple sweet potato 0.95 g, unus rice 0.67 g, potato 0.87 g, and, as a comparison, commercial synthetic starch indicators produced 0.58 g. Of the four starch sources, the glutinous rice starch indicator produced results closest to the synthetic indicator, with a difference of only 0.08 g. These findings indicate that glutinous rice starch has accuracy comparable to synthetic indicators, making it a potential alternative for effective iodometric titration indicators. Glutinous rice starch has the potential to be used as an effective, environmentally friendly, and more sustainable natural indicator compared to synthetic starch in iodometric titration.
POTENTIAL OF DAYAK ONION SKIN (ELEUTHERINE PALMIFOLIA) EXTRACT AS AN ALTERNATIVE INDICATOR FOR ACID BASE TITRATION PRACTICUM Noor Elfa; Rina Nur Hidayah
QUANTUM: Jurnal Inovasi Pendidikan Sains Vol 15, No 1 (2024): April 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/quantum.v15i1.17192

Abstract

Synthetic indicators such as phenolphthalein are used during acid-base titrations to determine the end point of the titration. These indicators are not environmentally friendly and the price is high. To overcome this, it is necessary to study the potential of natural indicators available in the environment, one of which was Dayak onion skin which has not been utilized after the tubers have been taken as an anti-cancer herbal medicine. The aim of this research was to determine the potential of Dayak onion skin (Eleutherine Palmifolia) as a natural indicator in acid-base titrations. The sampling collection of Dayak onions was done randomly in the city of Palangka Raya, Central Kalimantan. The method used in this study employed experimental techniques in the chemistry laboratory of FKIP ULM with the following steps: 1) Maceration of smoothed Dayak onion skin with 96% ethanol for 1, 2 and 3 days 2) Qualitative test of anthocyanin, color test with buffer pH 1-14, 3) Absorption measurement with a UV-Vis spectrophotometer at a wavelength of 200 - 400 nm, 4) Application of the extract as an indicator in acid-base titrations. The results showed that the optimum maceration time was on day 3 with an absorption of 4,520 at a wavelength of 380 nm. The application on the HCl – NaOH titration with a titration end point volume of 9.11 mL showed a color change from yellow to straw yellow, while the comparison indicator PP had a volume change of 8.57 mL with a color change from colorless to pink. The CH3COOH – NaOH titration gave a result of 11.43 mL and the PP indicator was 11.01 mL. For the NaHCO3 – HCl titration, the end point volume of the titration was 9.93 mL with a straw yellow – yellow color change and the MO indicator comparison was 10.27 mL with an orange – red color change. From the results of this research, there was a significant color change at the end point of the titration, so it can be stated that Dayak onion skin extract had the potential to be an alternative indicator in acid-base titration practice so that it can be a solution in reducing chemical pollution in the environment.
Co-Authors Arif Sholahuddin Rasyidah Rasyidah Rina Nur Hidayah Suyidno Suyidno