Portable Electronic Nose Sebagai Instrumen Untuk Diskriminasi Aroma Kopi Robusta Jawa Dan Robusta Sumatera Yang Terkorelasi Dengan Gas Chromatography Mass Spectrometry

Authors

  • Yesiana Arimurti Porgram Studi Pendidikan Fisika, FKIP, Universitas Sebelas Maret, Surakarta, Indonesia
  • Kuwat Triyana Program Studi Fisika, FMIPA, Universitas Gadjah Mada, Yogyakarta, Indonesia
  • Sri Anggrahini Program Studi Teknologi Pangan dan Hasil Pertanian, FTP, Universitas Gadjah Mada, Yogyakarta, Indonesia

DOI:

https://doi.org/10.25077/jif.10.2.113-124.2018

Abstract

Kualitas kopi sangat dipengaruhi oleh aromanya. Sedangkan aroma kopi dapat diperngaruhi oleh banyak faktor, salah satunya daerah asal kopi. Oleh karena itu, instrumen uji aroma sangat dibutuhkan terutama untuk kendali mutu pada saat proses pengolahannya. Dalam penelitian ini, aroma kopi diuji menggunakan electronic nose yang hasilnya dikorelasi dengan gas chromatography mass spectrometry (GC-MS). Biji kopi jenis robusta yang berasal dari Pulau Jawa (DIY) dan Sumatera digunakan sebagai sampel uji. Penyangraian (roasting) dilakukan selama 20 menit pada suhu 210 °C. Setelah proses roasting, selanjutnya biji kopi dihaluskan menjadi bubuk dengan grinder. Pola respon masing-masing sensor gas dalam electronic nose terhadap setiap sampel bubuk kopi, direkam. Kemudian dilakukan ekstraksi ciri dengan menggunakan dua metode, yakni ekstraksi ciri gradien dikalikan dengan nilai puncak dan ekstraksi nilai rerata. Principle Component Analysis (PCA), diterapkan untuk proses diskriminasi aroma bubuk kopi. Hasil analisa GCMS menunjukkan bahwa ada perbedaan senyawa aromatik yang terdeteksi antara kopi robusta yang berasal dari pulau Jawa dan dari pulau Sumatera. Hasil ini terkorelasi dengan hasil diskriminasi aroma kopi robusta dengan menggunakan electronic nose. Selanjutnya, electronic nose mempunyai potensi digunakan pada industri kopi sebagai instrumen untuk keperluan kendali mutu selama proses pengolahan.

 

Kata kunci: kopi robusta Jawa, robusta Sumatera, aroma, electronic nose, GC-MS

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Published

2018-10-22

How to Cite

Arimurti, Y., Triyana, K., & Anggrahini, S. (2018). Portable Electronic Nose Sebagai Instrumen Untuk Diskriminasi Aroma Kopi Robusta Jawa Dan Robusta Sumatera Yang Terkorelasi Dengan Gas Chromatography Mass Spectrometry. JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS, 10(2), 113–124. https://doi.org/10.25077/jif.10.2.113-124.2018

Issue

Vol. 10 No. 2 (2018): September 2018

Section

Research Article

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