Seawater reference material?

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Dynamic processes within vanadium complexes?

Any input on whether or not spectrophotometry or HPLC could be used to investigate dynamic processes within vanadium complexes in aqueous solutions? Thanks

06 July 2018 5,825 39 View

HPLC and vanadium

Hello, I am looking for an expert who has used HPLC(UV-Vis) for vanadium identification or/and speciation. I have specific questions and concerns and am hoping to get into discussion with an...

05 June 2016 9,779 0 View

Identifying Vanadium in soil samples using HPLC ?

Hello, I want to ask please about a soil sample preparation for HPLC. I have tried digestion, but running samples using HPLC did not give me some good chromatograms. I believe that I need to use...

04 May 2016 3,339 5 View

C18 HPLC column washing?

Hello, I am working on a project that uses HPLC to investigate the presence and speciation of vanadium in environmental samples. I have used vanadium standard and pre-treated my samples before...

31 December 2015 8,571 8 View

Any suggestions for a CRM of a beach sandy soil?

I wanted to ask please if some body here has used a CRM of a beach sandy soil sample?I am interested in vanadium contamination within a sandy beach in Dubai. I have tried to look in few CRM...

11 December 2015 4,133 13 View

Any advice on HPLC retention times?

Hi, I am new in the field of practical usage of the HPLC technique, I am working on a project that deals with characterizing vanadium within seawater samples. I have started using the technique...

10 November 2015 389 6 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View

How to simultaneously perform multiple biochemical assays?

I am a research scholar working on heavy metal stress on plants. I will be doing biochemical characterisation( protein, carbohydrate, proline, antioxidant enzymes and many more assays) at interval...

01 March 2021 6,999 3 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Naveed Akhtar

See the following references:

http://www.speciation.net/Public/Document/2005/11/18/CRMs_for_Speciation.html

http://highpuritystandards.com/water-standards/sea-water/

http://www.nrc-cnrc.gc.ca/eng/solutions/advisory/crm/certificates/nass_6.html

Companies that manufacture CRMs

http://www.speciation.net/Database/Companies/?ACTION=SEARCH&Name=&Keyword=&Type=9&Product=101&Status=&City=&Country=0

Iman Boukhobza

Thanks Naveed,

Any ideas for the usage of this reference material in HPLC characterization and speciation for vanadium metal ions?