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Refilda Refilda
Fakultas MIPA, Universitas Andalas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Journal : CHEMPUBLISH JOURNAL

 1 
PENENTUAN KANDUNGAN ANTIOKSIDAN DALAM RIMPANG KENCUR YANG DIEKSTRAKSI DENGAN BANTUAN GELOMBANG ULTRASONIK Refilda Suhaili
CHEMPUBLISH JOURNAL Vol. 3 No. 2 (2018): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.163 KB) | DOI: 10.22437/chp.v3i2.5769

Abstract

Kaempferia galanga L. rhizome is used a traditional medicine and as seasoning. Kaempferia galanga L. rhizome has many bioactivies beneficial to antioxidant. Extraction of antioxidant by maceration method takes a long time and the extraction process is not perfect so ultrasonic assisted extraction (UAE) are used to accelerate the extraction process. The propose of the research is to extract antioxidant from Kaempferia galanga L. rhizome by UAE and to determinate the antioxidant content by 1,1-diphenyl-2-picrilhydrazyl (DPPH) method. The optimum condition for extraction were 20 mL methanol as the solvent, the weight of sample 1,5 g, and extraction time 60 minutes. The total antioxidant content from Kaempferia galanga L. rhizome extraction by maceration and UAE were 0.6688 ± 0.02 and 0.8126 ± 0.02 mg/g DW. This study also validated the method of determining the total antioxidant content extracted with ultrasonic. The results of the method validation obtained linearity (r) = -0.9984, LoD value = 0.0283 mg/L, LoQ value = 0.0947 mg/L, precision (SDR = 1.97% and HORRAT = 0.96) and percent recovery 103.21%. Based on the method validation value, it can be said that the determination of the total antioxidant content in the kencur rhizome extracted with the help of UAE can be applied.
Analisis GC-MS ekstrak tanaman terfermentasi (ETT) dari kulit buah jengkol (Pithecellobium jiringa Prain) Refilda Suhaili; Lucy Prima Ardi; Emil Salim; Mai Efdi
CHEMPUBLISH JOURNAL Vol. 5 No. 1 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v5i1.7957

Abstract

Analysis of active compounds in fermented plant extract (FPE) from the ngapi nut peel using Effective Microorganism-4 (EM-4) has been done by Gas Chromatography-Mass Spectroscopy (GC-MS). There were 88 compounds found in fermented plant extract, the major content with the area above 1% were 7 compounds such as succinic acid; ethyl hydrogen succinate; 1,2,3-benzetriol; 3,3-dimethylhexanal; L-proline, 1-methyl-5-oxo-methyl ester; 3-methoxycinnamic acid and hexadecanoic acid. Based GC-MS analysis, fermented plant extract indicated that several compounds that have potential as biopesticides.
Pengaruh Lama Penyimpanan Ikan Sarden Kemasan Kaleng terhadap Kadar Logam Pb dan Cu Refilda Suhaili
CHEMPUBLISH JOURNAL Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

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ABSTRACT Canned sardines (Sardinella sp.) are very practical because they can be stored for a long time and can reduce contamination of bacteria and microorganisms from outside. However, direct contact with canned packaging for a long time can cause heavy metal contamination. Therefore, heavy metal concentrations of Pb and Cu from canned sardines (Sardinella sp.) were determined by Atomic Absorption Spectrophotometry (AAS) method. Samples of canned sardines (Sardinella sp.) digested using a mixture of concentrated HNO3 and 15% H2O2 (3:1). The samples tested were canned sardines with a storage time of 36 months (A), 18 months (B) and 6 months (C) after production. The results of Pb metal analysis of canned sardines (Sardinella sp.) in samples A, B, and C were 0.807 mg/L; 0.512 mg/L; and 0.387 mg/L. The concentration of Pb metal obtained in all samples exceeded the threshold value set by BPOM, at 0.3 mg/L. The concentration of Cu in samples A, B, and C were 2.718 mg/L; 1.996 mg/L; and 1.240 mg/L respectively . The concentration of Cu in all samples was still below the limit set by BPOM at 5 mg/L. The t-test statistic showed that there were significant differences in the concentration of Pb and Cu metals for the three types of samples (t-count>t-table). It can be concluded that storage time affects the concentration of Pb and Cu metals in canned sardines (Sardinella sp.). The longer sardines were stored in cans, the Pb and Cu metal concentrations would increase.
Analisis kadar logam berat (Fe, Zn, Pb, Cd) dan nilai risiko kesehatan dalam buah kemasan kaleng Refilda Suhaili; Yulizar Yusuf
CHEMPUBLISH JOURNAL Vol. 6 No. 1 (2021): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v6i1.12148

Abstract

Seiring dengan perkembangan teknologi yang semakin pesat, buah-buahan banyak dikemas dalam kaleng. Buah kemasan kaleng merupakan makanan yang sering dikonsumsi oleh manusia pada saat ini. Penyimpanan buah kemasan kaleng dalam waktu yang lama dapat menyebabkan terjadinya migrasi logam berat terhadap buah yang ada di dalam kemasan. Pada penelitian ini sampel yang digunakan yaitu 3 jenis buah-buahan dalam kemasan kaleng masing-masing dengan lama penyimpanan yang berbeda. Preparasi sampel dilakukan menggunakan metode destruksi basah dengan menambahkan campuran HNO3 pekat 65% dan H2O2 15% (3:1). Kandungan logam Fe, Zn, Pb, dan Cd dalam sampel ditentukan menggunakan metode Spektrofotometri Serapan Atom (SSA). Nilai Indeks Risiko Kesehatan (IRK) didapatkan dari hasil perhitungan Asupan Logam Harian (ALH) per dosis yang disarankan oleh WHO. Nilai ALH diperoleh dari perhitungan konsentrasi logam dengan SSA, faktor konversi, dan rata-rata asupan logam per berat badan manusia. Kadar logam berat di dalam ketiga jenis sampel secara umum diperoleh Fe>Zn>Pb>Cd. Konsentrasi logam berat berbanding lurus dengan lama produk disimpan dalam kemasan kaleng. Semakin lama produk disimpan maka konsentrasi logam yang diperoleh semakin tinggi. Nilai IRK yang diperoleh dari pengujian sampel untuk logam Cd yaitu >1 dapat diasumsikan adanya potensi risiko kesehatan, sedangkan untuk logam Pb, Fe, dan Zn <1 yang diasumsikan populasi dinyatakan aman. Nilai TIRK yang diperoleh dari penambahan nilai IRK logam Pb, Cd, Fe, dan Zn, didapatkan hasil dari setiap sampel >1 dapat dinyatakan bahwa sampel yang diuji memiliki potensi risiko kesehatan terhadap manusia. Penelitian lebih lanjut diperlukan untuk memperjelas hubungan antara kontaminasi buah oleh logam berat dari kemasan kaleng.
Co-Authors -, Yefrida Abdi Dharma Adewirli Putra Admi Admi Admi Admi Ainun Nasution Akmal Djamaan Ardiani, Ajeng Putri Ashikin, Nor Boneta, Fella Krisna Dheasy Gustira Dheasy Gustira Dini Hanifa Dwi Syukur Phameswari Edison Munaf Edison Munaf Elida Mardiah Emil Salim Farrah Aprilina Fella Krisna Boneta Fivi Mona Bareno Hamidah, Nofi Harza Dipajana Umardi Harza Dipajana Umardi Hayatul Isra Hermansyah Aziz Hermansyah Aziz Ilahi, Fitratul Imelda Imelda Imelda Imelda Indrawati - Indrawati - Indrawati Indrawati Indri Ticel Leone Irma Yanti Siregar Irmanida Batubara Jihanul Khaira Jihanul Khaira Jon Kanedi Lee Wah Lim Lucy Prima Ardi Mai Efdi Matlal Fajri Alif Mayaserli, Dyna Putri Mutia Ramadani ndrawati - Nofi Hamidah Nofita, Dewi Nor Ashikin Nor Ashikin Norman Ferdinal Novesar Jamarun Novita Lucia Novrizaldi Wardana Nurul Afifah Putri Ramadhani Rahmiana Zein Raihan Hanif Aulia Refinel - Richi Silvianti Riga Habib Ngestu Rosman, Widuri Safni Safni Salim, Emil Silvia Detri Susanti Suhartini - SUHARTINI - Sumaryati Syukur Suryati Suryati Syafrizayanti Syafrizayanti Syukri Syukri Tommi Hermansyah Toyohide Takeuchi Upita Septiani Wellia, Diana Vanda Widuri Rosman Willsant Saputra Yani Kasuma Putri Yefrida - Yefrida Yefrida Yetria Rilda Yulizar Yusuf Zilfa Zilfa Zulkarnain Chaidir