?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=IDENTIFIKASI+DAN+AUTENTIKASI+JAHE+MERAH+YANG%0D%0ATERKANDUNG+DALAM+MINUMAN+KEMASAN+MENGGUNAKAN%0D%0AMETODE+SPEKTROFOTOMETRI+FOURIER+TRANSFORM+INFRARED%0D%0A%0D%0A(FTIR)+DAN+KEMOMETRIKA&rft.creator=SYLFIA+%2C+AINI&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=Tingginya+harga+jahe+merah+di+pasar+serta+banyaknya+manfaat+menyebabkan+jahe%0D%0Aini+sering+dicampur+dengan+jahe+jenis+lain+oleh+pedagang+yang+membuat+kerugian%0D%0Abagi+konsumen.+Oleh+karena+itu%2C+dilakukan+penelitian+ini+dengan+tujuan+untuk%0D%0Amenganalisis+kemurnian+jahe+merah+di+pasar+Kota+Bandar+Lampung+dan%0D%0Amengevaluasi+validitas+metode+spektrofotometri+FTIR+dan+kemometrika.+Metode%0D%0Apenelitian+meliputi+preparasi+standar%2C+sampling+minuman+jahe+merah+kemasan+yang%0D%0Aberedar+di+pasar+Kota+Bandar+Lampung%2C+Preparasi+set+kalibrasi+dan+set+validasi%2C%0D%0Amenganalisis+menggunakan+instrument+FTIR%2C+dan+mengolah+data+hasil+FTIR%0D%0Adengan+metode+PCA+dan+PLS+menggunakan+software+Minitab.+Hasil+analisis+PCA%0D%0Amenunjukkan+bahwa+sampel+B+cenderung+mengelompok+pada+jahe+merah%2C%0D%0Asedangkan+sampel+A%2C+C%2C+D+dan+E+mengelompok+pada+jahe+gajah.+Pemodelan+PLS%0D%0Apada+set+kalibrasi+menghasilkan+nilai+R2%0D%0A%0D%0Asebesar+0%2C999973+dengan+nilai+RMSEC%0D%0Asebesar+0%2C1888%25%2C+sedangkan%2C+hasil+pemodelan+set+validasi+menggunakan+metode%0D%0APLS+menunjukan+nilai+R2%0D%0A%0D%0Asebesar+0%2C999813+dan+RMSECV+sebesar+1%2C684%25.+Hal+ini%2C%0D%0Amenunjukan+bahwa+model+yang+dibuat+sudah+baik+karena+tingkat+kesalahan+yang%0D%0Arendah.+Hasil+prediksi+menggunakan+model+PLS+yang+dikombinasikan+dengan%0D%0Aboxplot+menunjukan+kadar+jahe+merah+yang+terkandung+dalam+sampel+berkisar%0D%0Aantara+16%2C23%25-+97%2C69%25.%0D%0AKata+kunci%3A+Jahe%2C+Spektrofotometri+FTIR%2C+Kemometrika%2C+PCA%2C+dan+PLS.%0D%0A%0D%0A%0D%0AThe+high+price+of+red+ginger+in+the+market+and+its+many+benefits+cause+this+ginger%0D%0Ais+often+mixed+with+other+types+of+ginger+by+traders+which+makes+harm+to%0D%0Aconsumers.+Therefore%2C+this+study+was+conducted+with+the+aim+of+analyzing+the%0D%0Apurity+of+red+ginger+in+Bandar+Lampung+City+market+and+evaluating+the+validity+of%0D%0AFTIR+spectrophotometric+and+chemometric+methods.+The+research+methods+include%0D%0Astandard+preparation%2C+sampling+of+packaged+red+ginger+drinks+circulating+in+the%0D%0ABandar+Lampung+City+market%2C+preparation+of+calibration+sets+and+validation+sets%2C%0D%0Aanalyzing+using+FTIR+instruments%2C+and+processing+FTIR+result+data+with+PCA+and%0D%0APLS+methods+using+Minitab+software.+The+results+of+PCA+analysis+show+that+sample%0D%0AB+tends+to+cluster+on+red+ginger%2C+while+samples+A%2C+C%2C+D+and+E+cluster+on+elephant%0D%0Aginger.+PLS+modeling+on+the+calibration+set+produced+an+R2+value+of+0.999973+with%0D%0Aan+RMSEC+value+of+0.1888%25%2C+whereas%2C+the+results+of+modeling+the+validation+set%0D%0Ausing+the+PLS+method+showed+an+R2+value+of+0.999813+and+an+RMSECV+of%0D%0A1.684%25.+This+shows+that+the+model+made+is+good+because+of+the+low+error+rate.+The%0D%0Aprediction+results+using+the+PLS+model+combined+with+boxplots+showed+that+the+red%0D%0Aginger+concentration+contained+in+the+samples+ranged+from+16.23%25+to+97.69%25.%0D%0A%0D%0AKeywords%3A+Ginger%2C+FTIR+Spectrophotometry%2C+Chemometrics%2C+PCA%2C+and+PLS.&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2024-07-25&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82297%2F1%2FSKRIPSI%2520FULL%2520-%2520Sylfia%2520Aini.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82297%2F1%2FABSTRAK%2520-%2520Sylfia%2520Aini.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82297%2F2%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN%2520-%2520Sylfia%2520Aini.pdf&rft.identifier=++SYLFIA+%2C+AINI++(2024)+IDENTIFIKASI+DAN+AUTENTIKASI+JAHE+MERAH+YANG+TERKANDUNG+DALAM+MINUMAN+KEMASAN+MENGGUNAKAN+METODE+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%2F82297%2F