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All Journal Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya IJCR (Indonesian Journal of Chemical Research)
Fisabilla, Adhinda
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Health Professions Materials Science & Nanotechnology Medicine & Pharmacology

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Smart Biosensor Berbasis Nanopartikel Tembaga dengan Reduktor Kulit Buah Naga sebagai Pendeteksi Formalin pada Sampel Makanan Qomariyah, Ani; Fisabilla, Adhinda; Hanifa, Nur Lailatul; Kusuma, Okta Nata
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 2 (2024): Volume 9, ISSUE 2,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss2.art4

Abstract

Green chemistry technique was conducted for the first time to synthesize copper nanoparticles (Cu-NP) using CuSO4 as precursor and red dragon fruit peel extract as reducing agent which was then applied as formalin sensor. The extraction procedure of red dragon fruit peel was carried out by maceration technique with methanol solvent. Cu-NPs were produced through green chemistry by reduction method. Compounds in red dragon fruit peel extract reduce Cu2+ to Cu0. The successfully synthesized Cu-NPs were analyzed using FT-IR and UV-Visible Spectrophotometer. Identification of functional groups with FTIR showed a shift in wave number between pure CuSO4 precursor and Cu-NPs, indicating the interaction of functional groups. Based on 15 samples tested for formaldehyde levels, there were two samples with levels above the threshold, namely meatball 2 with an average formaldehyde level of 13.77 ± 0.25 ppm packaged without a “Halal” label and tofu 3 with a formaldehyde level of 4.18 ± 0.99 ppm packaged without a “Halal” label.
Escherichia coli and Salmonella sp. on some lettuce in the traditional market of Banyuwangi Regency Wulandari, Eka Yunita; Ayu, Sinta Nuriyah Putri; Hanifa, Nur Lailatul; Handayani, Brunika Mega; Fisabilla, Adhinda
Qanun Medika - Jurnal Kedokteran FK UMSurabaya Vol 8 No 01 (2024): Qanun Medika Vol 08 No 01 January 2024
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/jqm.v8i01.17265

Abstract

Escherichia coli is the main pathogenic bacteria which causes diarrhea in humans and the fourth highest cause of death which occurs all age groups. Salmonella sp is the cause of typhoid fever and findings of 350-810 cases each year. Diarrhea and typhoid fever are closely related to the consumption of raw vegetables, such as lettuce. This study aimed to analyze the contamination of E. coli and Salmonella sp on some lettuces in Traditional Markets of Banyuwangi Regency. This research was an analytic descriptive study using a cross-sectional design at the Laboratory of Microbiology, STIKES Banyuwangi from 6 to 11 June 2022 using 6 lettuces as research samples which were selected by accidental sampling. All (100%) lettuce samples in this study were contaminated with >1,100 CFU/ml E. coli. All (100%) samples in this study were positively contaminated by Salmonella sp with various contamination number, such as: 0.82x104; 0.47x104, 1.90x105, 2.05x106, 1.00x105 and 1.25x106 CFU/ml, respectively. All six lettuces obtained from the Traditional Market of Banyuwangi Regency did not meet the microbiological quality specified by SNI, indicating that they were not suitable for  direct (raw) consumption.
Co-Authors Ayu, Sinta Nuriyah Putri Handayani, Brunika Mega Hanifa, Nur Lailatul Kusuma, Okta Nata Qomariyah, Ani Wulandari, Eka Yunita