Hi Soheila, In my PhD I've extracted Cd and Zn from plant and yeast dry matter. I don't know if it works with your material. However, I basically did an extraction with Nitric Acid in glass vials, using a hot plate at 110oC for 8 hours. After digestion I used ashless paper filters and plastic funnels to filtrate. The pore size of the filters will depend on you material. I used a plant reference materials (cabbage leaves reference material) to make sure that my results were okay, and they were. I determined the metal concentration with ICP-MS.

The method is described in my paper here: Article Tolerance, toxicity and transport of Cd and Zn in Populus trichocarpa

I don't know if that would help.

Best of luck! Vinnie

Dear Soheila,

you can collect some important informations from articles given below.

piyal

https://www.researchgate.net/publication/280830950_Variation_of_Trace_Metals_in_Liquid_and_Suspended_Phases_of_Water_in_Middle_and_Lower_Catchments_of_River_Mahaweli_Sri_Lanka

Thank you , for your help.

I would just use HNO3 or AquaRegia to extract overnight with heat and slow stirer (check standard methods for quantity ~ 5 g in a 250 mL beaker); In the morning wait for settling for 2-3 hrs.; carefully pour off the supernatant from the top (that has not settled) ; dilute and analyse using ICP-OES or ICP-MS.

Thank you Nader.

Could you please send me the mentioned reference? I dont know which reference you mean exactly.

Thanks again.

Reference? This is a well know method; hmm ? reference is often from heavy metal extraction in sediments papers or check standard methods. I am sorry I don't have time to find a reference. I will cite one in a few minutes if I find one.

http://dergipark.gov.tr/download/article-file/83026

Check this review with references in the end and referal to EPA method.

Try the method I advised with a reference material listed in the previous ARTICLE I mentioned. What kind of suspended solid is this?

Thank you.I want to measure heavy metals in TSP (PM

Dear Shoheila,

Pls. go through APHA metod.

It provids complete solutions for your analysis. Also It provides alternative digestion metods and instrumentation （AAS/GF, ICPMS ...）

Piyal