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Nur Isnaini, Nur
SMA Islam Al Azhar 14 Semarang
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Journal : IJCR (Indonesian Journal of Chemical Research)

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Validasi Metode Penentuan Kandungan Kafein dalam Teh Hijau dengan FTIR Isnaini, Nur
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.art6

Abstract

The FTIR UATR method for quantifying caffeine in green tea samples was validated. ATR (Attenuated Total Reflectance) , a technique for direct analysis without sample preparation, was employed. Caffeine was determined at peak absorption between 1600 and 1700 cm-1. Calibration using standard concentrations from 0 to 5% yielded excellent linearity with a correlation coefficient value of 0.9978. Precision, measured as % RSD (2.8369%), met the acceptable limit of 2/3 the Horwitz CV (4.5323). Accuracy was confirmed through spiking, resulting in a recovery of 100.3%, within the acceptable range of 95-105%. These findings demonstrate the suitability of this method for caffeine analysis in green tea samples.
Co-Authors Agus Santosa Apdillah, Dicky Arfah, Siti Yuliaty Chansa Azura, Putri Dede Sugandi Estria, Suci Ratna Firdaus, Muhammad Aulia Iqbal Fitria, Zidna Istighnaul Fulanah, Umi Ikhsan, Farhan Maulana Indana Lazulfa, Indana Isna Hikmawati Kabib, Nur Komsin, Nabila Karimah Kris Linggardini Kusumantri, Megarini Larasaty, Dwi Lina Yulianti Lubis, Lili Khairani Azhari Manal, Sahlul Marta, Arnia Sactya Maulana, Muchammad Fariq Muryani, Dwi Mustiah Yulistiani muzaenah, tina Nafi’ah, Jamilatun Ningsih, Aditiana Nur Jannah Putri, Devi Amelia Ramdani, Meida Laely Ratnasari Ratnasari raudatul jannah Reni Purwo Aniarti Rifqi, Moch. Zainul Rustam Abd. Rauf Safitri, Wulan Ali Saputra, Muhammad Helmi Agung Saputra, Muhammad Helmi Agung Sari, Dhea Septian Meta Sholihah, Mar'atus Siagian, Zairul Abdi Siti Fatimah Azzahra Sumaryani, Sri Susana Widyaningsih Titiek Suhardi Haripurnomo Kushadiwijaya Hidayati Yunita Khusnul Khotimah Yusuf Amrozi Zuraidah, Dea Nur