I made an analysis with ICP, which gives metals present in it. How to check the compound of those metals present in textile sludge, e.g. instead of measuring iron (Fe) I have to measure iron compound (Fe2SO4)?
it is better to do TRACE METAL SPECIATiON ANALYSIS.. its is done by The group has worked on the following techniques:-
Solid phase extraction for the preconcentration of metals and organometallic species from natural waters.
Supercritical fluid extraction for the isolation of organometallic species from sediments and urban dust.
For other speciation applications, traditional liquid-liquid extraction techniques have been used. Also included in this reference list are several applications where liquid-liquid extraction is used in addition to other analyte isolation techniques.
Instrumental analysis
For the separation and detection of various species, gas chromatography coupled with microwave-induced plasma atomic emission spectrometry (GC-MIP-AES) or atomic absorption spectrometry (GC-AAS) is used. Other, more theoretical studies of instrument performance can be accessed here:
If you want to determine the chemical character of metal compounds, before starting with the methods suggested by dr. Kumar (agreeing with him that these methods can be used) , I would do a simple IR and/or Raman and XRD of the dried sludge. The IR would give some information about the presence of IR active anions (e.g. sulphate, nitrate, phosphate, organic anions, carbonates, etc.) and XRD would be able to assign the crystalline compounds are present in higher amount. ESCA (XPS) would give information about valence state of metals. These things would give you some information how you can start with extraction and other selection techniques.
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