Determination of Free Iron in Soil Using Inductively Coupled Plasma Spectroscopy
Objective:To identify and determine the free iron element in soil using inductively coupled plasma spectroscopy.Method:Firstly,based on the collected data and sample information,the detection limit standards were calculated.The ICAP 7400 ICP-OES instrument and the ortho phenanthroline colorimetric method were used,combined with Fe 238.204 spectral lines for colorimetric analysis.Based on this,the standard deviation of the detection limit for each cycle was calculated by taking into account the changes in the lines of free iron.Within a linear range,the precision values of the determination of free iron were calculated using ICP-OES method and inductively coupled plasma spectroscopy.Based on the background conditions of samples with low,medium,and high free iron content,the final recovery ratio of free iron was calculated.The data obtained from different samples were combined and compared for verification and analysis.Result:In the determination of samples with low,medium,and high free iron content,the final recovery ratio obtained can all reach 15 or above.Conclusion:For the three selected samples,the recovery ratio of free iron in soil determined by inductively coupled plasma spectroscopy can all reach 15 or above,indicating that the designed free iron determination method is more targeted and stable,with better practical application effect and practical application value.
application of inductive couplingplasmaspectral methodfree stateiron determination
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