#TITLE_ALTERNATIVE#

• Main Author: Zainal, Kamaruddin
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/8382
• Institution: Institut Teknologi Bandung

Abstract: <br /> <br /> <br /> The main purpose of this research is to compare which is the best methods to determine iron and nickel of the clock spring alloy by measuring the contents iron and nickel. As reference is used the direct method without separation by atomic absorption Spectrophotometry with samples of the clock spring alloy and simulated samples of pure substance ( Analytical Grande ). <br /> <br /> <br /> Based on a prior trial run on the clock spring , the best solvent obtained for the metal such as Fe, Ni, Pb, Cu, Go, Mn, Cr, Al, Zn, Ca, Mg, K and as. were a mixture of con centrated HNO and lCl with a ratio of 1 : 2 to n-202 30 916 Due to the numerous amounts and varieties of interfering metal, it will be hard to determine the Fe and Ni content by the Spectronic-20 method. Therefore an effort has been made to analyze the metals Fe and Ni from their mixture, by means of the study of hydroxide precipitate separa-tion. <br /> <br /> <br /> The research data has shown that there is a difference between the measurements of Spectronic-20 -through the pro-cess of hydroxide precipitation separation and the process without separation or direct process. From the fragments of simulation the values obtained for recovery of Fe were 99.6 % from the standard of pure metal and 86.3 up to 96.8 % from the alloy whereas for Ni the values of recovery we re 99.1 % from the standard of pure metal and 76.1 up to 90.3 % from the standard of pure which is added to the annoying metal through the process without the separation. <br /> <br /> <br /> The recovery of Fe metal content from the clock spring was 97.9 dollar by the process of separation and 96.8 5 by the process of non-separation, while the recovery of Ni was 95.8 % by the separation process-and 90.2 % by the non-sepa ration process, at the PE fragment. <br /> <br /> <br /> For the LB fragment recovery of Fe was 97.5% by the separation process and 95.3%by the non-separation process, whereas Ni was 91.9 % from the-separation process and 84.8 by-non-separation. <br /> <br /> <br /> From DE fragment has been obtained the recovery for Fe 98.7 % from the process of separation and 97.1 % from the non separation process, while for Ni the values obtained were 94.3 % and 86.3 % respectively. <br />