?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=UJI+AUTENTIKASI+PRODUK+KOPI+YANG+BEREDAR+DI+PASARAN+KOTA%0D%0ABANDAR+LAMPUNG+MENGGUNAKAN+SPEKTROFOTOMETRI+FOURIER%0D%0A%0D%0ATRANSFORM+INFRARED+(FTIR)+DAN+KEMOMETRIKA&rft.creator=SAFITRI+HAUROTUL%2C+JAMALAT&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=Pemalsuan+bahan+pangan+di+Indonesia+semakin+banyak+dilakukan+terutama+pada%0D%0Akomoditas+kopi.+Kegiatan+pemalsuan+ini+memberikan+dampak+buruk+bagi+konsumen.%0D%0AOleh+karena+itu%2C+penelitian+ini+dilakukan+dengan+tujuan+untuk+menganalisis+kemurnian%0D%0Akopi+di+pasaran+Kota+Bandar+Lampung+dan+mengevaluasi+validitas+metode%0D%0Aspektrofotometri+FTIR+dan+kemometrika.+Metode+penelitian+meliputi+preparasi+standar%2C%0D%0Asampling+kopi+yang+beredar+di+pasaran+Kota+Bandar+Lampung%2C+preparasi+set+kalibrasi%0D%0Adan+set+validasi%2C+menganalisis+menggunakan+instrument+FTIR%2C+dan+mengolah+data+hasil%0D%0AFTIR+dengan+metode+PCA+dan+PLS+menggunakan+software+Minitab.+Sampel+diambil%0D%0Adari+beberapa+penjual+di+Kota+Bandar+Lampung+sebanyak+lima+sampel.+Hasil+analisis%0D%0APCA+menunjukan+bahwa+sampel+A%2C+B%2C+dan+C+cenderung+mengelompok+dan+mendekat%0D%0Apada+standar+kopi+robusta%2C+sedangkan+sampel+D+dan+E+sedikit+menjauh+dari+standar+kopi%0D%0Arobusta+dan+sedikit+berada+di+plot+standar+tepung+jagung.+Pemodelan+PLS+pada+set%0D%0Akalibrasi+menghasilkan+nilai+R2%0D%0A%0D%0Asebesar+0%2C999981+dengan+nilai+RMSEC+sebesar%0D%0A%0D%0A0%2C1357%25%2C+sedangkan+pada+set+kalibrasi+menghasilkan+nilai+R%0D%0A2%0D%0Asebesar+0%2C999926+dengan%0D%0Anilai+RMSEP+sebesar+0%2C66%25.+Hal+ini%2C+menunjukan+bahwa+model+yang+dibuat+sudah+baik%0D%0Akarena+tingkat+kesalahan+yang+rendah.+Hasil+prediksi+menggunakan+model+PLS+yang%0D%0Adikombinasikan+dengan+boxplot+menunjukan+kadar+kopi+robusta+yang+terkandung%0D%0Adalam+sampel+kopi+di+pasaran+Bandar+Lampung+berkisar+71%2C662%25-98%2C243%25.%0D%0AKata+kunci%3A+Kopi%2C+Spektrofotometri+FTIR%2C+PCA%2C+PLS%2C+dan+Kemometrika.%0D%0A%0D%0AFood+adulteration+in+Indonesia+is+increasingly+practiced%2C+especially+in+coffee%0D%0Acommodities.+This+counterfeiting+activity+has+a+negative+impact+on+consumers.%0D%0ATherefore%2C+this+study+was+conducted+to+analyze+the+purity+of+coffee+in+the+Bandar%0D%0ALampung+City+market+and+evaluate+the+validity+of+the+FTIR+spectrophotometric+and%0D%0Achemometric+methods.+The+research+methods+include+standard+preparation%2C+sampling%0D%0Acoffee+from+the+Bandar+Lampung+City+market%2C+preparing+calibration+and+validation%0D%0Asets%2C+analyzing+using+FTIR+instruments%2C+and+processing+FTIR+result+data+with+PCA+and%0D%0APLS+methods+using+Minitab+software.+Five+samples+were+taken+from+several+sellers+in%0D%0ABandar+Lampung+City.+The+PCA+analysis+results+showed+that+samples+A%2C+B%2C+and+C%0D%0Atended+to+cluster+and+be+closer+to+the+robusta+coffee+standard%2C+while+samples+D+and+E%0D%0Awere+slightly+away+from+the+robusta+coffee+standard+and+closer+to+the+corn+starch%0D%0Astandard+plot.+PLS+modeling+on+the+calibration+set+resulted+in+an+R2+value+of+0%2C999981%0D%0Awith+an+RMSEC+value+of+0%2C1357%25%2C+while+the+validation+set+resulted+in+an+R2+value+of%0D%0A0%2C999926+with+an+RMSEP+value+of+0%2C66%25.+This+indicates+that+the+model+is+good+due+to%0D%0Athe+low+error+rate.+The+prediction+results+using+the+PLS+model+combined+with+boxplots%0D%0Ashow+that+the+robusta+coffee+content+in+coffee+samples+in+the+Bandar+Lampung+market%0D%0Aranges+from+71%2C662%25-98%2C243%25.%0D%0AKeywords%3A+Coffee%2C+FTIR+Spectrophotometry%2C+PCA%2C+PLS%2C+and+Chemometrics.&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2024-07-18&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F84682%2F1%2F2017011012_Safitri%2520Haurotul%2520Jamalat_Abstrak%2520-%2520Safitri%2520Haurotul%2520Jamalat.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F84682%2F2%2F2017011012_Safitri%2520Haurotul%2520Jamalat_Skripsi%2520Full%2520Tanpa%2520Lampiran%2520-%2520Safitri%2520Haurotul%2520Jamalat.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F84682%2F3%2F2017011012_Safitri%2520Haurotul%2520Jamalat_Skripsi%2520Tanpa%2520Bab%2520Pembahasan%2520%2528Tanpa%2520Lampiran%2520Isi%2529%2520-%2520Safitri%2520Haurotul%2520Jamalat.pdf&rft.identifier=++SAFITRI+HAUROTUL%2C+JAMALAT++(2024)+UJI+AUTENTIKASI+PRODUK+KOPI+YANG+BEREDAR+DI+PASARAN+KOTA+BANDAR+LAMPUNG+MENGGUNAKAN+SPEKTROFOTOMETRI+FOURIER+TRANSFORM+INFRARED+(FTIR)+DAN+KEMOMETRIKA.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F84682%2F