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ITS » Undergraduate Theses » Kimia
Posted by anisw@its.ac.id at 19/05/2016 15:02:19  •  1601 Views


STUDI GANGGUAN MGII DALAM ANALISA BESIII DENGAN PENGOMPLEKS O-FENANTROLIN MENGGUNAKAN SPEKTROFOTOMETER UV-VIS

INTERFERENCE STUDY OF MgII ON IRONII DETERMINATION WITH O-PHENANTROLINE BY SPECTROPHOTOMETRY UV-VIS METHOD

Author :
SARI, NOVITA  ( 1410100057 )




ABSTRAK

Besi merupakan logam transisi yang dapat membentuk senyawa kompleks dengan o-fenantrolin. Kompleks besi dengan o-fenantrolin membentuk senyawa Fefenantrolin32 dan menghasilkan warna merah jingga yang dapat diukur dengan spektrofotometer UV-Vis. BesiIII direduksi menjadi besiII menggunakan pereduksi natrium tiosulfat. Senyawa kompleks Fefenantrolin32 terbentuk pada pH 45 sehingga ditambahkan larutan buffer asetat pH 45. Absorbansi maksimum kompleks ini didapatkan pada panjang gelombang 510 nm. Penambahan ion MgII 004 ppm pada larutan besiIII 5 ppm dapat mengganggu proses penentuan besi dengan menurunkan absorbansi. Prosen recovery dari besi diketahui 9099. Relatif standar deviasi RSD yang didapat sebesar 224 ppt dan koefisien variasi CV sebesar 0224.


ABSTRACT

Iron is a transition metal compounds that able form complexes with o-phenanthroline. Complex iron dan o-phenanthroline forming compound Fephenanthroline32 dan produces orange-red color that can be measured with a UV-Vis spectrophotometer. IronIII is reduced to ironII using a reducing sodium thiosulfate. Complex compound Fe phenanthroline32 formed at pH 4.5 that added a solution of acetate buffer pH 4.5. The maximum absorbance of the complex is obtained at a wavelength of 510 nm. The addition of MgII in a solution of 0.04 ppm of ironIII 5 ppm iron can interfere with the process of determining the decrease of absorbance. Percent recovery of ironIII is 90.99. Relative standard deviation RSD is 2.24 ppt and coefficient of variation CV is 0.224.



Keywords[Fe(fenantrolin)3]2+; o-fenantrolin; spektrofotometer UV-Vis
 
Subject:  NONE
Contributor
  1. Drs. R. Djarot Sugiarso K.S., M.S
Date Create: 30/01/2015
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Undergraduate-14001160008810
Collection ID: 14001160008810
Call Number: RSKi 543.55 Sar s


Source
Undergraduate Theses of Chemistry, RSKi 543.55 Sar s, 2015

Coverage
ITS Community

Rights
Copyright @2015 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




[ Download - Open Access ]

  1.  ITS-Undergraduate-41569-1410100057-Abstract_id.pdf - 175 KB
  2.  ITS-Undergraduate-41569-1410100057-Abstract_en.pdf - 175 KB
  3.  ITS-Undergraduate-41569-1410100057-Conclusion.pdf - 216 KB




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