?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=STUDI+PENGGUNAAN+UV-VIS+SPECTROSCOPY+DAN+METODE+SIMCA%0D%0AUNTUK+MEMBEDAKAN+KOPI+BUBUK+BERDASARKAN+UMUR%0D%0ASIMPAN&rft.creator=KOMANG+SUKARYE+%2C+1414071054&rft.subject=Budidaya+tanaman&rft.description=Selama+penyimpanan+kopi+bubuk+akan+mengalami+penurunan+mutu+yang%0D%0Adisebabkan+oleh+faktor-faktor+lingkungan.+Sehingga+produk+tersebut+dapat+ditolak%0D%0Aoleh+konsumen+atau+dapat+membahayakan+orang+yang+mengkonsumsinya.%0D%0APemalsuan+atau+pengoplosan+pada+kopi+dapat+dilakukan+dengan+mencampurkan%0D%0Akopi+segar+yang+baru+disangrai+dengan+kopi+yang+telah+lama+disimpan+(expired).%0D%0APengoplosan+atau+pencampuran+kopi+sangat+sulit+diidentifikasi+apabila+kopi+sudah%0D%0Adalam+bentuk+bubuk.+Maka+penelitian+ini+dilakukan+untuk+mengetahui+dan%0D%0Amengidentifikasi+perbedaan+kopi+segar+dengan+kopi+expired+menggunakan+UV-Vis%0D%0ASpectrometer+dan+metode+soft+independent+modelling+of+class+analogy+(SIMCA).%0D%0AKomposisi+bahan+yang+digunakan+dalam+penelitian+ini+yaitu+1+gram+dengan%0D%0Ajumlah+sampel+sebanyak+100+sampel+kopi+segar+dan+100+sampel+kopi+expired.%0D%0ASampel+kopi+1+gram+diekstraksi+menggunakan+aquades+sebanyak+50+ml+dengan%0D%0Asuhu+90-98oC.+Kemudian+dilakukan+pengenceran+dengan+perbandingan+1+ml%0D%0Asampel+ekstraksi+kopi+dengan+20+ml+aquades.+Sampel+yang+sudah+diencerkan%2C%0D%0Adimasukkan+ke+dalam+kuvet+sebanyak+2+ml+dan+diambil+data+absorbansinya%0D%0Adengan+2+kali+pengulangan+menggunakan+UV-Vis+Spectrometer+(UV-Vis+Genesys%0D%0A10s%2C+Thermo+Scientific%2C+USA)+pada+panjang+gelombang+190+%E2%80%93+1100+nm.%0D%0AHasil+klasifikasi+menunjukkan+bahwa+metode+PCA+dan+SIMCA+mampu%0D%0Amembedakan+kopi+segar+dan+kopi+expired.+Hasil+analisis+PCA+terbaik+diperoleh%0D%0Auntuk+tipe+spektra+kombinasi+standard+normal+variate+(SNV)+dan+moving+average%0D%0A9+segmen+pada+panjang+gelombang+190+%E2%80%93+1100+nm+(panjang+gelombang+penuh).%0D%0APada+pengembangan+model+spektra+kombinasi+standard+normal+variate+(SNV)%0D%0Adan+moving+average+9+segmen+menghasilkan+nilai+PC1+sebesar+99%25+dan+PC2%0D%0Asebesar+0%25.+Sedangkan+untuk+klasifikasi+SIMCA+diperoleh+nilai+akurasi+(AC)%2C%0D%0Anilai+sensitivitas+(S)%2C+dan+nilai+spesifisitas+(SP)+sebesar+100%25.%0D%0AKata+kunci+%3A+Kopi+Bubuk%2C+Diskriminasi%2C+UV-Vis+Spectrometer%2C+Principal%0D%0AComponent+Analysis+(PCA)%2C+Soft+Independent+Modelling+of+Class+Analogy%0D%0A(SIMCA).%0D%0A%0D%0Aabstract%0D%0A%0D%0ADuring+storage%2C+ground+roasted+coffee+will+experience+a+quality+degradation%0D%0Acaused+by+environmental+factors.+Therefore%2C+the+product+can+be+rejected+by+the%0D%0Aconsumer+or+can+harm+the+person+who+consumes+it.+Counterfeiting+or+mixing%0D%0Acoffee+can+be+done+by+mixing+fresh+coffee+that+has+just+been+roasted+with+coffee%0D%0Athat+has+long+been+stored+(expired).+Coffee+adulteration+is+very+difficult+to+identify%0D%0Aif+the+coffee+beans+have+been+roasted+or+already+in+powder+form.+Thus%2C+this%0D%0Aresearch+was+conducted+to+find+out+and+identify+the+difference+between+the+fresh%0D%0Acoffee+and+expired+one+using+UV-Vis+Spectrometer+and+soft+independent%0D%0Amodeling+of+class+analogy+(SIMCA)+method.%0D%0AThe+composition+of+the+materials+used+in+this+research+was+1+gram+for+each%0D%0Asamples+with+a+total+number+of+100+samples+of+fresh+coffee+and+100+samples+of%0D%0Aexpired+coffee.+1+gram+of+coffee+sample+was+extracted+by+using+50+ml+of+aquades%0D%0Awith+a+temperature+of+90+%E2%80%93+98+oC.+Then+it+was+diluted+with+1+ml+sample+of+coffee%0D%0Aextraction+samples+with+20+ml+of+aquades.+The+2+ml+of+diluted+sample+was+pipeted%0D%0Ainto+cuvet+and+the+absorbance+data+were+measured+twice+by+using+UV-Vis%0D%0ASpectrometer+(UV-Vis+Genesys+10s%2C+Thermo+Scientific%2C+USA)+at+wavelengths%0D%0Afrom+190+%E2%80%93+1100+nm.%0D%0AClassification+results+show+that+PCA+and+SIMCA+methods+were+able+to%0D%0Adiscriminate+fresh+coffee+and+expired+one.+The+best+PCA+analysis+results+were%0D%0Aobtained+for+combination+spectra+type+of+standard+normal+variate+(SNV)+and+9-%0D%0Asegment+of+moving+average+at+wavelengths+from+190+%E2%80%93+1100+nm+(full%0D%0Awavelength).+In+the+development+of+the+combination+spectra+model+of+standard%0D%0Anormal+variate+(SNV)+and+9-segment+of+moving+average%2C+resulted+in+PC1+value+of%0D%0A99%25+and+PC2+value+of+0%25.+While%2C+for+SIMCA+classification%2C+100%25+of+accuracy%0D%0A(AC)%2C+sensitivity+(S)%2C+and+specificity+(SP)+were+obtained.%0D%0AKeywords%3A+Ground+Roasted+Coffee%2C+Discrimination%2C+UV-Vis+Spectrometer%2C%0D%0APrincipal+Component+Analysis+(PCA)%2C+Soft+Independent+Modelling+of+Class%0D%0AAnalogy+(SIMCA).&rft.publisher=FAKULTAS+PERTANIAN+&rft.date=2018-08-16&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F37218%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F37218%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F37218%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++KOMANG+SUKARYE+%2C+1414071054++(2018)+STUDI+PENGGUNAAN+UV-VIS+SPECTROSCOPY+DAN+METODE+SIMCA+UNTUK+MEMBEDAKAN+KOPI+BUBUK+BERDASARKAN+UMUR+SIMPAN.++FAKULTAS+PERTANIAN+%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F37218%2F