?url_ver=Z39.88-2004&rft_id=2017011063&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGUKURAN+KAPASITAS+ANTIOKSIDAN+PADA+EKSTRAK+TEH+(Camellia+sinensis)+MENGGUNAKAN+METODE+AGAR+PATI+IODIN+BERDASARKAN+DIFUSI+AGAR&rft.creator=VIA+%2C+APRILIA&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=Radikal+bebas+diidentifikasi+sebagai+akar+penyebab+berbagai+masalah+kesehatan.+Minuman+seperti+kopi+dan+teh+terbukti+memiliki+antioksidan+yang+efektif+sebagai+bentuk+perlindungan+terhadap+radikal+bebas.+Metode+pengujian+antioksidan+yang+sudah+ada+membutuhkan+biaya+mahal.+Maka%2C+dibutuhkan+metode+baru+dalam+pengujian+antioksidan+yang+sederhana%2C+cepat+dan+murah.%0D%0APenelitian+ini+bertujuan+untuk+mempelajari%2C+mendapatkan+informasi+unjuk+kerja%2C+menentukan+kapasitas+antioksidan+pada+ekstrak+teh+menggunakan+metode+agar+pati+iodin.+Karakteristik+kinerja+dari+metode+agar+pati+iodin+ditentukan+dengan+uji+linearitas%2C+presisi%2C+akurasi%2C+limit+deteksi+dan+limit+kuantifikasi+kemudian+dievaluasi.+Penentuan+kapasitas+antioksidan+dilakukan+dengan+mengukur+diameter+area+difusi%2C+menghitung+luas+area%2C+kemudian+luas+area+dianalisis+untuk+mengetahui+kapasitas+antioksidan.%0D%0AHasil+penelitian+yang+diperoleh+metode+agar+pati+iodin+memiliki+linearitas+pada+waktu+pengamatan+1%2C+2%2C+3+dan+24+jam+berturut-turut+sebesar+0%2C9653%3B+0%2C9877%3B+0%2C9793+dan+0%2C9905.+Presisi+pada+waktu+1%2C+2%2C+3+dan+24+jam+berturut-turut+sebesar+4%2C8%25%3B+9%2C1%25%3B+3%2C7%25+dan+3%2C2%25.+Pada+uji+akurasi+memiliki+rata-rata+%25error+dalam+pengamatan+1%2C+2%2C+3+dan+24+jam+berturut-turut+sebesar+9%2C87%25%3B+12%2C2%25%3B+3%2C72%25+dan+7%2C53%25.+LoD+pada+waktu+1%2C+2%2C+3+dan+24+jam+berturut-turut+adalah+0%2C0022%3B+0%2C0038%3B+0%2C0016+dan+0%2C0011.+LoQ+berturut-turut+adalah+0%2C0073%3B+0%2C0127%3B+0%2C0054+dan+0%2C0037.+Performa+kinerja+terbaik+diperoleh+pada+waktu+pengamatan+24+jam.+Hasil+pengukuran+kapasitas+antioksidan+ekstrak+teh+konsentrasi+8+mg%2FmL+dengan+massa+0%2C48+mg+setara+dengan+asam+askorbat+dengan+konsentrasi+0%2C846+mg%2FmL+dengan+massa+0%2C05+mg.%0D%0AKata+kunci%3A+kapasitas+antioksidan%2C+iodin%2C+luas+area+difusi%2C+ekstrak+teh%0D%0A%0D%0AFree+radicals+are+identified+as+the+root+cause+of+various+health+problems.+Drinks+such+as+coffee+and+tea+have+been+proven+to+have+effective+antioxidants+as+a+form+of+protection+against+free+radicals.+Existing+antioxidant+testing+methods+are+expensive.+Therefore%2C+a+new+method+for+testing+antioxidants+is+needed+that+is+simple%2C+fast+and+cheap.%0D%0AThis+research+aims+to+study%2C+obtain+information+on+working+instructions%2C+determine+the+antioxidant+capacity+of+tea+extracts+using+the+iodine+starch+agar+method.+The+performance+characteristics+of+the+iodine+starch+agar+method+were+determined+by+linearity%2C+precision%2C+accuracy%2C+detection+limit+and+quantification+limit+tests+and+then+evaluated.+Determination+of+antioxidant+capacity+is+carried+out+by+measuring+the+diameter+of+the+diffuse+area%2C+calculating+the+area%2C+then+analyzing+the+area+to+determine+the+antioxidant+capacity.%0D%0AThe+results+of+the+research+showed+that+the+iodine+starch+method+had+linearity+at+observation+times+of+1%2C+2%2C+3+and+24+hours+respectively+of+0.9653%3B+0.9877%3B+0.9793+and+0.9905.+Precision+at+1%2C+2%2C+3+and+24+hours+respectively+was+4.8%25%3B+9.1%25%3B+3.7%25+and+3.2%25.+The+accuracy+test+has+an+average+%25error+in+observations+of+1%2C+2%2C+3+and+24+hours+respectively+of+9.87%25%3B+12.2%25%3B+3.72%25+dan+7.53%25.+LoD+at+1%2C+2%2C+3+and+24+hours+respectively+is+0.0025%3B+0.0039%3B+0.0018+and+0.0013.+LoQ+is+0.0082%3B+0.0130%3B+0.0061+and+0.0042.+The+best+performance+was+obtained+at+24+hours+observation+time.+The+results+of+measuring+the+antioxidant+capacity+of+tea+extract+with+a+concentration+of+8+mg%2FmL+with+a+mass+of+0.48+mg+are+equivalent+to+ascorbic+acid+with+a+concentration+of+0.846+mg%2FmL+with+a+mass+of+0.05+mg.%0D%0AKeywords%3A+antioxidant+capacity%2C+iodine%2C+diffusion+area%2C+tea+extract&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2025-01-23&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F84006%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F84006%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F84006%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++VIA+%2C+APRILIA++(2025)+PENGUKURAN+KAPASITAS+ANTIOKSIDAN+PADA+EKSTRAK+TEH+(Camellia+sinensis)+MENGGUNAKAN+METODE+AGAR+PATI+IODIN+BERDASARKAN+DIFUSI+AGAR.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.++++(Submitted)++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F84006%2F