Simple Design Flow Analysis System for Determination of Iron by Spectrophotometric Method

Abstract

The purpose of this research is to make a series of analyzes using a flow system with a bottle Marriote as pump and spectrophotometric method for determining the content of iron in water samples. Determination of iron by this method used 1,10-fenantrolin complexing or 2,2-bipyridyl. In this method, Fe3+ is reduced to Fe2+ prior complexed with iron to form a specific color and then flowed it through a marriote bottle next to the spectrophotometer detector. The average flow rate of the liquid in the bottle Marriote amounted to 0.037 mL / sec. Limit detection obtained in the both of batch and simple flow systems are 0.00017 ppm and 0.00023 ppm respectively. Sensitivity obtained in both of batch and simple flow systems are 0.027 and 0.035 respectively. Flow rate precision values are expressed Marriote bottle with Kv values <5%. Values accuracy was expressed as percent of recovery of 99% in the batch method, whereas the simple flow system analysis method was 98.5%. Results of t-test analysts suggest that iron determination using flow systems analysis (FIA) with the replacement pump bottle Marriote was not different significantly from the results obtained with in the batch system.