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All Journal QUANTUM: Jurnal Inovasi Pendidikan Sains Jurnal Pengelolaan Laboratorium Pendidikan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Hidayah, Rina Nur
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Chemistry Earth & Planetary Sciences Education Engineering Physics

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POTENTIAL OF DAYAK ONION SKIN (ELEUTHERINE PALMIFOLIA) EXTRACT AS AN ALTERNATIVE INDICATOR FOR ACID BASE TITRATION PRACTICUM Elfa, Noor; Hidayah, Rina Nur
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.
Kajian Kualitatif Potensi Ekstrak Etanol Buah Karamunting sebagai Indikator Asam Basa Elfa, Noor; Hidayah, Rina Nur; Gunawan, Hendra
Jurnal Pengelolaan Laboratorium Pendidikan Vol.7, No.1, Januari 2025
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.7.1.66-72

Abstract

Karamunting (Melastoma malabathricum) adalah tumbuhan lokal yang menghasilkan buah berwarna ungu tua hingga hitam yang mengandung senyawa flavonoid dan tanin. Warna dari tanin dapat dimanfaatkan sebagai pewarna kertas indikator asam basa di laboratorium. Penelitian ini bertujuan untuk menentukan potensi ekstrak buah karamunting sebagai indikator kertas universal untuk menentukan pH larutan.. Metode penelitian meliputi ekstraksi zat warna dari buah karamunting, pembuatan kertas indikator, serta pengujian kertas pada berbagai larutan dengan rentang pH yang berbeda. Hasil penelitian menunjukkan bahwa ekstrak buah karamunting memberikan perubahan warna yang jelas pada kertas indikator yang telah dibuat, dengan variasi warna yang signifikan pada pH rendah (asam) hingga pH tinggi (basa). Hal ini menunjukan bahwa karamunting dapat menjadi alternatif indikator alami yang efektif, ekonomis, dan ramah lingkungan untuk uji asam-basa di laboratorium.
Study of water quality for post-mining extermination, Banjarbaru City Sofarini, Dini; Agustian, Reza; Yunandar, Yunandar; Hidayah, Rina Nur
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 12, No 3 (2023): DECEMBER 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.3.32909

Abstract

Banjarbaru City is one of the regencies/cities in South Kalimantan Province which continues to develop in various sectors, one of which is mining. Among the mining areas that left traces of voids in Banjarbaru include the Lake Seran quarry which was once a sand mining site, as well as the Pumpung quarry which was a diamond mining location. Remains of former mining excavations that are left for a long time will be filled with water which accumulates various substances remaining at the excavation site, especially heavy metals which in general are important parameters and affect water quality. This study aims to examine the quality of ex-mine water in Banjarbaru by focusing on analysis through the Pollution Index (IP) of heavy metal parameters in the waters of the research location. The results obtained are that the ex-mine pits in Lake Seran and Pumpung, Banjarbaru City, have quite good water quality, where most of them are at class 2 quality standards. However, further management is needed to improve water quality at some points that are still not meets class 2 quality standards so that it is included in the category of lightly polluted.Keywords:MiningHeavy MetalsWater QualityPollution Index
Study of water quality for post-mining extermination, Banjarbaru City Sofarini, Dini; Agustian, Reza; Yunandar, Yunandar; Hidayah, Rina Nur
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 12, No 3 (2023): DECEMBER 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.3.32909

Abstract

Banjarbaru City is one of the regencies/cities in South Kalimantan Province which continues to develop in various sectors, one of which is mining. Among the mining areas that left traces of voids in Banjarbaru include the Lake Seran quarry which was once a sand mining site, as well as the Pumpung quarry which was a diamond mining location. Remains of former mining excavations that are left for a long time will be filled with water which accumulates various substances remaining at the excavation site, especially heavy metals which in general are important parameters and affect water quality. This study aims to examine the quality of ex-mine water in Banjarbaru by focusing on analysis through the Pollution Index (IP) of heavy metal parameters in the waters of the research location. The results obtained are that the ex-mine pits in Lake Seran and Pumpung, Banjarbaru City, have quite good water quality, where most of them are at class 2 quality standards. However, further management is needed to improve water quality at some points that are still not meets class 2 quality standards so that it is included in the category of lightly polluted.Keywords:MiningHeavy MetalsWater QualityPollution Index
Co-Authors Agustian, Reza Dini Sofarini Elfa, Noor HENDRA GUNAWAN B11211055 Yunandar Yunandar