Electronic Theses and Dissertation

Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan geografis sumber minyak nilam serta rasio penambahan adsorben zeolite (NIR) dan bentonite (FTIR) terhadap karakteristik minyak nilam. Minyak nilam yang digunakan pada penelitian ini berasal dari Aceh Utara dan Aceh Selatan. Karakterisasi spektrum NIR (zeolite) dan spektrum FTIR (bentonite) dianalisis menggunakan analisis multivariat kemometri dengan metode Principal Component Analysis (PCA) dan Partial Least Square Discriminant Analysis (PLS-DA). Hasil penelitian menunjukan secara geografis tidak terdapat perbedaan visual spektrum NIR dan FTIR. Akan tetapi ketika diplotkan dengan analisis PCA terlihat perbedaan yang sangat jelas. Penambahan adsorben zeolit berdasarkan spektrum NIR dan penambahan adsorben bentonit berdasarkan spektrum FTIR berpengaruh terhadap komposisi kimia minyak nilam ketika di analisis dengan PCA terlihat data berkelompok dengan baik, hal ini ditandai dengan range antara titik minyak nilam murni dan minyak nilam yang divariasikan dengan adsorben terpisah. Penambahan adsorben bentonite dan zeolite berpengaruh terhadap perubahan sifat fisika dan kimia minyak nilam yang merujuk pada uji parameter minyak nilam berdasarkan SNI-06-2385-2006. Plot PLS-DA menunjukan hasil yang baik, hal ini dibuktikan dengan nilai Coefficient of Determination, Coefficient correlation mendekati satu dan nilai Root Mean Square Error Coefficient of Variation (RMSECV) yang mendekati nol.

This study aims to determine the effect of geographical differences in patchouli oil sources and the ratio of addition of zeolite (NIR) and bentonite (FTIR) adsorbents to the characteristics of patchouli oil. Patchouli oil used in this study came from North Aceh and South Aceh. The characterization of the NIR spectrum (zeolite) and the FTIR spectrum (bentonite) were analyzed using chemometric multivariate analysis using Principal Component Analysis (PCA) and Partial Least Square Discriminant Analysis (PLS-DA) methods. The results showed that geographically there was no visual difference between the NIR and FTIR spectra. However, when plotted with PCA analysis, the difference is very clear. The addition of zeolite adsorbent based on the NIR spectrum and the addition of bentonite adsorbent based on the FTIR spectrum affected the chemical composition of patchouli oil when plotted with PCA, the data were grouped well, this was indicated by the range between the point of pure patchouli oil and patchouli oil which was varied with separate adsorbents. The addition of bentonite and zeolite adsorbents has an effect on changes in the physical and chemical properties of patchouli oil which refers to the patchouli oil parameter test based on SNI-06-2385-2006. The PLS-DA plot shows good results, this is evidenced by the Coefficient of Determination, Coefficient correlation value approaching one and the Root Mean Square Error Coefficient of Variation (RMSECV) value approaching zero.