?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=STUDI+ANALISIS+LOGAM+Ca+DAN+Mg+MENGGUNAKAN+ASAM+%0D%0ATANAT+SECARA+SPEKTROFOTOMETRI+ULTRAUNGU-TAMPAK&rft.creator=NUR+WULANDARI%2C+1517011038&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.description=Analysis+of+Ca+and+Mg+metal+ions+with+tannic+acid+was+carried+out+by+ultraviolet%EF%BF%BDvisible+spectrophotometry.+This+study+was+aimed+to+determine+the+maximum+%0D%0Alambda+of+complex+Ca-tannic+acid+at+optimum+pH%2C+optimum+concentration%2C+%0D%0Aoptimum+volume+and+time+of+stability.+The+results+showed+that+the+maximum+%0D%0Alambda+of+complex+Ca-tannic+acid+was+420+nm+at+pH+9%2C+with+stoichiometric+%0D%0Aconcentration+of+Ca+%3A+tannic+acid+was+1%3A2%2C+the+stoichiometric+volume+of+Ca+%3A+tannic+%0D%0Aacid+was+1%3A4%2C+and+the+time+of+stability+was+over+40+minutes.+The+validation+%0D%0Amethod+of+complex+Ca-tannic+acid+meets+the+AOAC+acceptance+standard.+The+%0D%0Alinearity+with+the+r-value+of+0.9993%2C+the+LoD+and+LoQ+was+obtained+0.000968+and+%0D%0A0.003227+respectively.+The+precision+value+with+%25RSD+of+3.09717+%25%2C+and+the+%0D%0Aaccuracy+value+with+the+%25+recovery+obtained+is+82.445%25.+While+the+results+%0D%0Ashowed+that+the+maximum+lambda+of+complex+Mg-tannic+acid+was+442+nm+at+pH+%0D%0A9%2C+with+stoichiometric+concentration+of+Mg+%3A+tannic+acid+was+1%3A2%2C+the+%0D%0Astoichiometric+volume+of+Mg+%3A+tannic+acid+was+1%3A4%2C+and+the+time+of+stability+was+%0D%0Aover+40+minutes.+The+validation+method+of+complex+Mg-tannic+acid+meets+the+%0D%0AAOAC+acceptance+standard.+The+linearity+with+the+r-value+of+0.9997%2C+the+LoD+%0D%0Aand+LoQ+was+obtained+0.001210+and+0.004033+respectively.+The+precision+value+%0D%0Awith+%25RSD+of+2.885854+%25%2C+and+the+accuracy+value+with+the+%25+recovery+obtained+%0D%0Ais+104.05%25..%0D%0AKeywords%3A+tannic+acid%2C+Ca-tannic+acid+complex%2C+Mg-tannic+acid+complex+%0D%0Aultraviolet-visible+spectrophotometry%0D%0A%0D%0ATelah+dilakukan+studi+analisis+ion+logam+Ca+dan+Mg+dengan+asam+tanat+secara+%0D%0Aspektrofotometri+ultraungu-tampak.+Studi+ini+dilakukan+untuk+mengetahui+%0D%0Apanjang+gelombang+maksimum+kompleks+Ca-asam+tanat+dan+Mg-asam+tanat+pada+%0D%0ApH+optimum%2C+konsentrasi+optimum%2C+volume+optimum+dan+waktu+kestabilan.+Hasil+%0D%0Apenelitian+menunjukan%2C+bahwa+panjang+gelombang+maksimum+untuk+kompleks+%0D%0ACa-asam+tanat+adalah+419+nm+pada+pH+9%2C+dengan+perbandingan+stoikiometri+%0D%0Avariasi+konsentrasi+Ca+%3A+asam+tanat+yaitu+1%3A2%2C+dengan+perbandingan+stoikiometri+%0D%0Avariasi+volume+Ca+%3A+asam+tanat+1%3A4+dan+mencapai+waktu+kestabilan+setelah+40+%0D%0Amenit.+Validasi+metode+pembentukan+kompleks+Ca-asam+tanat+diperoleh+nilai+r+%0D%0Asebesar+0%2C9993%2C+nilai+LoD+dan+LoQ+yang+diperoleh+sebesar+0%2C000968+dan+%0D%0A0%2C003227%2C+nilai+presisi+dengan+%25RSD+sebesar+3%2C09717+%25%2C+serta+nilai+akurasi%0D%0Adengan+%25+recovery+yang+diperoleh+yaitu+82%2C445%25.+Sedangkan+panjang+gelombang+%0D%0Amaksimum+untuk+kompleks+Mg-asam+tanat+adalah+442+nm+pada+pH+9%2C+dengan+%0D%0Aperbandingan+stoikiometri+variasi+konsentrasi+Mg+%3A+asam+tanat+yaitu+1%3A2%2C+dengan+%0D%0Aperbandingan+stoikiometri+variasi+volume+Mg+%3A+asam+tanat+1%3A4+dan+mencapai+%0D%0Awaktu+kestabilan+setelah+40+menit.+Validasi+metode+pembentukan+kompleks+Mg%EF%BF%BDasam+tanat+diperoleh+nilai+r+sebesar+0%2C9997%2C+nilai+LoD+dan+LoQ+yang+diperoleh+%0D%0Asebesar+0%2C001210+dan+0%2C004033%2C+nilai+presisi+dengan+%25RSD+sebesar+2%2C885854+%25%2C+%0D%0Aserta+nilai+akurasi+dengan+%25+recovery+yang+diperoleh+yaitu+104%2C05%25.%0D%0AKata+Kunci+%3A+Asam+Tanat%2C+Kompleks+Ca-asam+tanat%2C+Kompeks+Mg-asam+tanat%2C+%0D%0ASpektrofotometri+Ultaungu-Tampak%0D%0A&rft.publisher=Fakultas+Matematika+dan+Ilmu+Pengetahuan+Alam&rft.date=2019&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F56539%2F1%2F1.%2520ABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F56539%2F2%2F2.%2520SKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F56539%2F3%2F3.%2520SKRIPSI%2520FULL%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++NUR+WULANDARI%2C+1517011038++(2019)+STUDI+ANALISIS+LOGAM+Ca+DAN+Mg+MENGGUNAKAN+ASAM+TANAT+SECARA+SPEKTROFOTOMETRI+ULTRAUNGU-TAMPAK.++Fakultas+Matematika+dan+Ilmu+Pengetahuan+Alam%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F56539%2F