Pencirian Kopi Robusta Bengkulu dari Kemungkinan Bahan Pencampur Menggunakan Kombinasi Spektroskopi FTIR dan Kemometrik

https://doi.org/10.22146/agritech.64432

Deni Agus Triawan(1*), Ghufira Ghufira(2), Morina Adfa(3), Mohamad Rafi(4)

(1) Program Studi D3 Lab Sains, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu
(2) Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu
(3) Research Center of Sumatera Natural Product and Functional Materials, Universitas Bengkulu, Jl. WR. Supratman, Kandang Limun, Muara Bangkahulu, 38121, Bengkulu
(4) Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Gedung Kimia Wing 1 Lantai 3, Jl. Tanjung Kampus IPB Dramaga Bogor 16680, Bogor, Jawa Barat
(*) Corresponding Author

Abstract


Penelitian ini bertujuan untuk mengidentifikasi kemurnian kopi bubuk yang beredar di pasaran Kota Bengkulu menggunakan kombinasi spektroskopi FTIR dan teknik kemometrik guna autentifikasi dan kontrol mutu kopi bubuk. Desain penelitian dibuat dengan variabel berupa kopi murni, jagung roasted dan beras roasted, kopi campur jagung roasted (50% b/b), jenis kopi campur beras roasted (50%b/b) dan 18 sampel kopi komersial. Masingmasing variabel tersebut dibuat 3 kali pengulangan. Berdasarkan hasil spektrum FTIR dari kopi murni, jagung roasted dan beras roasted diketahui bahwa terdapat pola spektrum yang hampir mirip dan sulit dibedakan. Analisis PCA dengan bantuan program Unscrambler X menunjukkan nilai PC-1 dan PC-2 yang dapat mendeskripsikan 97% dari total varians (PC-1 = 91%; PC-2 = 6%). Berdasarkan PC-1, kopi murni berada pada sisi positif sedangkan bahan pencampur berupa jagung dan beras berada pada sisi negatif. Plotting sampel kopi komersial pada kopi murni dan kopi dengan campuran beras roasted maupun jagung roasted diperoleh nilai PC-2 dan PC-1 sebesar 95% (PC-1 = 87%; PC-2 = 8%). Dari plotting tersebut, ada indikasi 1 dari 18 sampel mengalami pencampuran dengan jagung atau beras namun konsentrasi pencampurannya tidak dapat diketahui.

Keywords


Kemometrik; kopi; spektroskopi FTIR

Full Text:

PDF


References

Christou, C., Agapiou, A., & Kokkinofta, R. (2018). Use of FTIR spectroscopy and chemometrics for the classification of carobs origin. Journal of Advanced Research, 10, 1–8. https://doi.org/10.1016/j.jare.2017.12.001

Ebrahimi-Najafabadi, H., Leardi, R., Oliveri, P., Chiara Casolino, M., Jalali-Heravi, M., & Lanteri, S. (2012). Detection of addition of barley to coffee using near infrared spectroscopy and chemometric techniques. Talanta, 99, 175–179. https://doi.org/10.1016/j.talanta.2012.05.036

El-Abassy, R. M., Donfack, P., & Materny, A. (2011). Discrimination between Arabica and Robusta green coffee using visible micro Raman spectroscopy and chemometric analysis. Food Chemistry, 126(3), 1443–1448. https://doi.org/10.1016/j.foodchem.2010.11.132

Lopez-Vidal, S., Rodriguez-Estevez, V., Lago, S., Arce, L., & Valcarel, M. (2008). The application of GC – MS and chemometrics to categorize the feeding Regime of Iberian Pigs in Spain. Chromatographia, 68(October), 593–601. https://doi.org/10.1365/s10337-008-0752-x

Matwijczuk, A., Oniszczuk, T., Matwijczuk, A., Chruściel, E., Kocira, A., Niemczynowicz, A., Wójtowicz, A., Combrzyński, M., & Wiacek, D. (2019). Use of FTIR spectroscopy and chemometrics with respect to storage conditions of Moldavian dragonhead Oil. Sustainability (Switzerland), 11(22). https://doi.org/10.3390/su11226414

Purwakusumah, E. D., Rafi, M., Syafitri, U. D., Nurcholis, W., Agung, M., & Adzkiya, Z. (2014). Identification and authentication of jahe merah using combination of FTIR spectroscopy and chemometrics. Agritech, 34(1), 82–87. https://doi.org/10.22146/agritech.9526

Rachmawati, Rohaeti, E., & Rafi, M. (2017). Combination of near infrared spectroscopy and chemometrics for authentication of taro flour from wheat and sago flour. Journal of Physics: Conference Series, 835(1). https://doi.org/10.1088/1742-6596/835/1/012011

Rafi, M., Anggundari, W. C., & Irawadil, T. T. (2016). Potensi spektroskopi FTIR-ATR dan kemometrik untuk membedakan rambut babi, kambing, dan sapi. Indonesian Journal of Chemical Science, 5(3), 229–234. https://doi.org/10.15294/ijcs.v5i3.10654

Rafi, M., Purwakusumah, E., Ridwan, T., Barus, B., Sutandi, A., & Darusman, L. (2015). Geographical classification of java tea (Orthosiphon stamineus) from Java Island by FTIR spectroscopy combined with canonical variate analysis. Jurnal Sains dan Matematika, 23(1), 25–31.

Rafi, M., Rohaeti, E., Miftahudin, A., & Darusman, L. K. (2011). Differentiation of Curcuma longa, Curcuma xanthorrhiza and Zingiber cassumunar by thin layer chromatography fingerprint analysis. Indonesian Journal of Chemistry, 11(1), 71–74. https://doi.org/10.22146/ijc.21423

Rohaeti, E., Muzayanah, K., Septaningsih, D. A., & Rafi, M. (2019). Fast analytical method for authentication of chili powder from synthetic dyes using UV-Vis spectroscopy in combination with chemometrics. Indonesian Journal of Chemistry, 19(3), 668–674. https://doi.org/10.22146/ijc.36297

Sabir, A., Rafi, M., & Darusman, L. K. (2017). Discrimination of red and white rice bran from Indonesia using HPLC fingerprint analysis combined with chemometrics. Food Chemistry, 221, 1717–1722. https://doi.org/10.1016/j.foodchem.2016.10.114

Syah, H., Yusmanizar, & Maulana, O. (2013). Karakteristik fisik bubuk kopi Arabika hasil penggilingan mekanis dengan penambahan jagung dan beras ketan. Jurnal Teknologi Dan Industri Pertanian Indonesia, 5(1), 32–37. https://doi.org/10.17969/jtipi.v5i1.1000



DOI: https://doi.org/10.22146/agritech.64432

Article Metrics

Abstract views : 2425 | views : 2212

Refbacks

  • There are currently no refbacks.




Copyright (c) 2022 Deni Agus Triawan, Morina Adfa, Ghufira Ghufira, Mohamad Rafi

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

agriTECH has been Indexed by:


agriTECH (print ISSN 0216-0455; online ISSN 2527-3825) is published by Faculty of Agricultural Technology, Universitas Gadjah Mada in colaboration with Indonesian Association of Food Technologies.


website statisticsView My Stats