INTERPRETATION OF FTIR SPECTRA OF CRUDE EXTRACT OF RENGGAK FRUIT PEEL: DEVELOPMENT OF A CHEMISTRY MAGAZINE AS A SUPPLEMENT TO ORGANIC CHEMISTRY LECTURES

Abstract

This study was conducted to analyze the FTIR spectra of Renggak fruit peel extracts and present the interpretation results in the form of a chemistry magazine intended as supplementary reading for students. The extraction of Renggak fruit peels was performed using two solvents, ethanol and methanol. The research applied the 4D development model, which includes the stages of definition, design, development, and dissemination. The validity and feasibility of the magazine were evaluated through expert validation and student response assessments. Validation was carried out by three lecturers from the Chemistry Education program, while student trials involved 65 Chemistry Education students at the University of Mataram who had completed the course Determination of Organic Compound Structures. FTIR analysis of the ethanol extract revealed absorption bands corresponding to hydroxyl (OH), carbonyl (C=O), alkyl (CH), C–O bonds, methyl (CH₃), methylene (CH₂), and aliphatic hydrocarbon (C–H) groups. In contrast, the methanol extract showed absorption of OH, C=O, CH, CH₃, CH₂, and aliphatic C–H groups. The study produced an average reliability score of 96.25%. Based on the Aiken V index, the magazine achieved an average validity score of 0.91, categorized as very valid. Student responses indicated a practicality level of 90.3%, classified as very practical. These findings suggest that the chemistry magazine is suitable for use as a learning supplement.

ABSTRAK

Perkembangan ilmu kimia yang pesat memerlukan strategi pembelajaran yang efektif, terutama pada materi hidrokarbon yang kerap menjadi tantangan bagi peserta didik. Penelitian ini bertujuan untuk menganalisis kebutuhan media pembelajaran kimia pada materi hidrokarbon berupa kartu permainan edukatif terintegrasi elaborative thinking. Fokus utama penelitian adalah menggali pandangan guru kimia mengenai penggunaan kartu permainan edukatif dan penerapan elaborative thinking dalam pembelajaran. Penelitian ini menggunakan metode survei eksploratif dengan pendekatan kualitatif yang melibatkan 5 guru kimia pada berbagai sekolah di Yogyakarta. Data dikumpulkan menggunakan angket semi-terbuka yang terdiri dari 16 pertanyaan yang mencakup aspek pemahaman, penerapan, kendala, serta tanggapan partisipan terhadap pengembangan kartu permainan edukatif terintegrasi elaborative thinking. Hasil penelitian menunjukkan bahwa partisipan memberikan tanggapan positif terhadap kartu permainan edukatif yang akan dikembangkan. Berdasarkan hasil penelitian dapat disimpulkan bahwa partisipan setuju terhadap adanya pengembangan media pembelajaran kimia materi hidrokarbon berupa kartu permainan edukatif dan memberikan saran agar kartu dibuat secara komprehensif dengan menggunakan bahasa yang santai dan sederhana.