Hi
Its depend your sample type and your access to instrumental analysis. But in my perspective Atomic absorption spectroscopy (AAS) would be useful .although try to find proper standard method in ASTM or other industrial standard like DIN, BSI and ISO.
Best regards
mohamad
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwiggISI3P7JAhVMaRQKHSfdC4cQFggsMAI&url=https%3A%2F%2Fwww.agilent.com%2Fcs%2Flibrary%2Fapplications%2Fsi-01638.pdf&usg=AFQjCNH0blElsQsDccUmSqR76iGkvojTOg&sig2=MnkgVWDGhJRPQSr0o-caAA&bvm=bv.110151844,d.d24
http://www.academia.edu/6610621/ANALYSIS_OF_HEAVY_METALS_BY_USING_ATOMIC_ABSORPTION_SPECTRO-SCOPY_FROM_THE_SAMPLES_TAKEN_AROUND_VISAKHAPATNAM
The answer provided above is correct. It will depend on the specific metal, access to instruments, the detection level required and the extraction level used. In addition to AAS, there is ICP. The equipment costs more, but it provides a lower detection limit.
ICP_MS is the most practical and acceptable insturment to analyze heavy metals.
174
It is solely depend on sample type and the analysis method. I suggest you to use ICP-MS Technology because of its availability for very lower detection levels as low as one part in 1000000000000000 (part per quadrillion, ppq).
well, it depends on how precise you would like to measure. In AAS, you can reduce matrix effect, but in ICP-MS you can't reduce it. On the other hand in AAS, you can measure single metal content in time, whereas in ICP-MS you can measure multi-metal.
Another thing, what kind of samples you would like to measure. ICP-OES is relatively good for measureng metal content in water and low detection limit. so low content in the sample, is not possible to measure on it. AAS is relatively less maintenance cost but more precision you will get.
ICP-OES/AAS can be used for heavy metals analysis.All you need is the sample preparation.If you have sample in powder form xrf can also be used for meal analysis where the sample preparation is not much as like AAS. It gives the concentration of the elements by % wt ratio.
thank you for all comments.what about SEM(scanning electron microscope) instrument?which analyse heavy metals or not?
thank you for all comments.what about SEM(scanning electron microscope) instrument?which analyse heavy metals or not?
thank you for all comments.what about SEM(scanning electron microscope) instrument?which analyse heavy metals or not?
The SEM will have troubles to give you correct information on concentration!
for assessing contaminated soils we use wavelength dispersive X-ay fluorescence spectroscopy in connection with the OXIQUANT calibration system.
https://www.schweizerbart.de/papers/zdgg_alt/detail/142/54576/Zur_Element_Dispersion_an_Flusssedimenten_der_Oker_Niedersachsen_rontgenfluoreszenz_spektrometrische_Untersuchungen
2 years ago I work with ICP-MS (Thermo Scientific, iCAP Qc, and between 1990 and 2014 with ICP OES - first AtomScan 25, later JY-138 ULTRACE).
http://www.thermoscientific.com/content/tfs/en/product/icap-q-icp-ms.html
ICP-MS is the most effective (very low det. limits - overall less than 1 ppb, and for many elements in magnitude of ppt's or a bit less). But some elements have memory effect - for example Hg (this is also - using ICP OES).
First you have to ask you figure what you are after: concentrations in extracts ( in this case you are often in conflict with detection limits) or total concentrations: if you are bound to methods analysing solutions you have first to solve the problem of digesting and dissolution, wich is to some extend much more critical for the entire analysis: we for instance do aqua regia digestuon or nitric acid in microwaved high pressure vessels. In silica rich samples this still needs a treatment with HF afterwards
Thats why we prefer XRF for total element deteermination, preferably after dussolving the entire sample in molten boric acid.
In my sample,metals are unknown.so thinking,, which one gives accurate concentration of metals? In AAS it analyse single metal which we have to mention them to analyse.what about XRF ??
Did you collect your samples from a contaminated area? then obviously you have some info about which kind of contamination exists there. In other hand, if you have treated them then you also know what was the treatment solution.
i think you have to focus which type of metals are your interest. you can even use AAS and run several metal concentration analysis for example, Cu, Zn, Cd, Pb, As so on. Or you want to make wide variety then you have to use ICP-MS. Even ICP-MS, they are also not measuring all in the same time. they do in a cluster of metal concentration. Most ICP-MS analysis providing org. also give a choice of group of metals to a client for analysis.
AAs... I am satisfied from my soil result so I am advising you....
ICP-MS is the best way for Identification of heavy metals. However AAS with graphite or Ion Chromatograph can also be useful.
Greetings!
Inductively coupled plasma mass spectrometry (ICP-MS) is the best for the estimation of heavy metals but if not available atomic absorption could also be used as recommended by many researchers above.
Inductively Coupled Plasma - Mass Spectrometry (ICP-MS) will be better than the Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES)
@ Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES)
ICP-MS (ppt) Multi-elements
ICP-AES (ppb) Multi-elements
ASS(ppm) single element
ICP-MS is the best, because it can detect metal even at very low concentration
ICP-MS technique is a highly active field of research and application in atomic spectroscopy for heavy metals even low concentration.