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All Journal LAW REFORM Diktum Agrointek Jurnal Teknologi agriTECH Warta IHP (Warta Industri Hasil Pertanian) E-Dimas: Jurnal Pengabdian kepada Masyarakat Jurnal Aplikasi Teknologi Pangan QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Kosmik Hukum Jurnal Bioindustri Indonesian Journal for Social Responsibility Jurnal Res Justitia : Jurnal Ilmu Hukum JURNAL AGROINDUSTRI HALAL Jurnal Pengabdian Masyarakat Fakultas Teknik: Jurnal Abditek Jurnal Sosial, Sains, Terapan dan Riset (Sosateris) Hakim: Jurnal Ilmu Hukum dan Sosial Perkara: Jurnal Ilmu Hukum Dan Politik al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Elektronik Pendidikan Matematika Tadulako
Taufik, Moh
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Agriculture, Biological Sciences & Forestry Humanities 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 Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Social Sciences Other

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Journal : agriTECH

 1 
Evaluation of Major Fatty Acids Determination in Palm Oil by Gas Chromatography-Flame Ionization Detection Moh Taufik; Hanifah Nuryani Lioe; Nancy Dewi Yuliana
agriTECH Vol 36, No 3 (2016)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (549.026 KB) | DOI: 10.22146/agritech.16603

Abstract

The fatty acid composition of palm oil is the major factor influencing its physical and chemical properties. The purpose of this research was to evaluate the analytical performance of major fatty acids (palmitic acid, stearic acid, oleic acid, and linoleic acid) analysis in palm oil. Triglycerides of palm oil were derivatized to fatty acid methyl esters (FAMEs) by using boron trifluoride (BF3) in methanol. FAMEs were determined by gas chromatography-flame ionization detection (GC-FID) using DB-23 capillary column as stationary phase. The studied parameters were instrument performance analysis, the efficiency of fatty acid derivatization, stability of derivatized analytes, accuracy, repeatability, intra-lab reproducibility, ruggedness, and method uncertainty. The evaluation results showed the instrument linearity at a working range of 5 to 40 mg/mL marked by coefficient of determination (R2) between 0.991-0.995. Instrument limits of detection (LOD) and instrument limits of quantification (LOQ) for 4 major fatty acids analysis were 26-35 µg/mLand 86-128 µg/mL, respectively. The increase of fatty acid concentration led to the decrease of derivatization efficiency in the fatty acids analysis. The result also showed that derivatized analytes were stable during 24 h storage at freeze temperature. The average recovery values by spiking method with the spiking concentration at 50 and 90 mg/g sample were at 75-94 % for stearic and linoleic acids analysis, however those for palmitic and oleic acids analysis were considered very low (<40 %), due to their low derivatization efficiency. Repeatability and intra-lab reproducibility of 4 major fatty acids analysis were at acceptable ranges, 0.45-1.38 % and 1.15-2.03 %, respectively. Determination by varying the volume of derivatizing agent showed the rugged method. Uncertainty of repeatability (Ur) and uncertainty of reproducibility (Ur) were ranged at 1.84-9.02 mg/g and 1.40-10.65 mg/g, respectively. This method was considerably reliable for the analysis of less abundance fatty acids in palm oil, stearic and linoleic acids.
Validasi Metode Analisis Kadar Kalsium pada Susu Segar secara Titrasi Kompleksometri Moh. Taufik; Seveline Seveline; Emilia Ratih Saputri
agriTECH Vol 38, No 2 (2018)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (137.019 KB) | DOI: 10.22146/agritech.25459

Abstract

Analysis of calcium content in fresh milk generally uses Atomic Absorption Spectroscopy (AAS). Alternatively, it could be analyzed using complexometric titration. The study aimed to validate the method of calcium content analysis in fresh milk by complexometric titration. The results showed that the linearity test using calcium standard solution at a working range of 4-24 mg/100 mL had R2 of 0.9983, while the limit of detection and limit of quantification were 0.47 mg/100 mL and 1.57 mg/100 mL, respectively. The accuracy by spiking method at the spiking concentration of 60 mg/100 mL sample was 99.29%. The repeatability and intra-lab reproducibility showed acceptable precision with CV value of 0.98% and 2.59%, respectively. The results of ruggedness test showed that this method was rugged to the variation of sample volume and ethylenediaminetetraacetic acid (EDTA) concentration. This study proved that complexometric titration can be used to determine calcium content in fresh milk. ABSTRAKAnalisis kadar kalsium pada susu segar umumnya menggunakan Atomic Absorption Spectroscopy (AAS) yang relatif mahal. Salah satu metode alternatif yang dapat digunakan adalah titrasi kompleksometri. Sampai sekarang, data validasi terhadap metode tersebut pada sampel susu segar belum tersedia. Tujuan penelitian ini adalah memvalidasi metode analisis kadar kalsium pada susu segar secara titrasi kompleksometri. Hasil penelitian menunjukkan uji linearitas dengan menggunakan larutan standar kalsium pada rentang 4-24 mg/100 mL mempunyai nilai R2 sebesar 0,9983, sedangkan nilai batas deteksi dan batas kuantifikasi berturut-turut adalah 0,47 mg/100 mL dan 1,57 mg/100 mL. Nilai akurasi (recovery) sebesar 99,29% pada konsentrasi spiking 60 mg/100 mL sampel. Hasil penelitian atau metode uji yang divalidasi menunjukkan nilai keterulangan dan reprodusibilitas intralab yang baik dengan nilai CV analisis berturut-turut 0,98% dan 2,59%. Hasil uji ketangguhan menunjukkan metode ini bersifat tangguh (rugged) terhadap variasi volume sampel dan konsentrasi asam etilenadiaminatetraasetat (EDTA) yang digunakan. Berdasarkan hasil penelitian tersebut, metode titrasi kompleksometri dapat digunakan untuk menentukan kadar kalsium pada susu segar.  
Co-Authors Achmad Faqih Aimim-Tham, Sukanya Al Akbar, Ramadhana Fatahillah Amaliyah, Nada Rifqi Aminah Aminah Angga Prasetyo Aranggraeni, Renda Bachrul Amiq Bha’iq Roza Rakhmatullah Borman, M. Syahrul Chairunnisa Oktofyani Fanzurna Diamonda, Sadewa Aziz Emilia Ratih Saputri Emilia Ratih Saputri Eny Yulianti, Eny Erwin Aditya Pratama Fajar Wibisono Fitria, Yati GAMMA ADITYA RAHARDI Gandung Sugita Hanifah Nuryani Lioe Hasanur Mohammad Firdausi Heni Oktafiana Himmatul Barroroh Ilzamha Hadijah Rusdan Indah Putri Divia Ismail Yahya Khausan, Makmur Lilik Miftahul Khoiroh Manurung, Marintan Paskalia Marintan Paskalia Manurung Maya Adriyanti Mubarok, Imam Anas Mulfirana Nancy Dewi Yuliana Nofi Diana Nurwulan Purnasari PUDJI ASTUTI Qiram, Syahrul Rizky Kusumawardani Royyanuddin, Moh Saputri, Emilia Ratih Seftiono, Hermawan Septin Puji Astuti Seveline, Seveline Sri Wulandari, Khotimah Sugiarto, Imawan Sukayasa Syahidah Syahidah Wijaya , Alex Sandi Wijaya Murti Indriatama Wiratman, Ajus Yoni Atma