What is the most reliable digestion method for bio-materials for assessing biotoxicity (knowing that many toxic metal compounds are insoluble)?

More Uriah Alexander Lar's questions See All

May i ask about titration for Crude Rice bran oil. Acid values result shows so low. How can i correct it ?

I use 0.1 N of KOH in buret and 10 ml of 2-propanol with 1g of crude rice bran oil by adding phenolphthalein indicater. I neutralized 2-propanol alcohol to avoid acidity before adding to crude...

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It has been difficult identifying bedbugs using the prothorax. Anyone with an identified specimen who can help me identify mine?

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What could be responsible for the significant Eu anomalies in varieties of hydrothermal flourite minerals hosted by sedimentary rocks?

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Could someone explain to me what might have caused the sudden change of water to red colour in a volcanic crater lake?

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Would one envisage crustal involvement in the evolution of a suite of basaltic rocks which show significant enrichment in Zr and SiO2?

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Reference dose and Maximum acceptable concentrations HMs

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Bing Xu

I suggest that the organic samples should be ashed, and then digested by HNO3. The aqua regia sometimes can not digest total organic matter, particularly for large samples.

Uriah Alexander Lar

Thanks Bing Xu. I am sure this has worked for you, so I will try it and compare with results from aqua regia digestion.