atomic absorption troublshouting, Chemistry

atomic absorption troublshouting, Chemistry

Assignment Help:

Dear sir,
We need your consultancy in a technical problem that we are confronting, and we would really appreciate your help
We are in the process of implementing the heavy metal analysis in fish and water by atomic atomic absorption spectroscopy,
I’m still in the sample preparation optimization phase, and I’m confronting some problems,

Il explain in brief the problem in my last results obtained:
For arsenic analysis, 0.2 g sample is digested with Nitric acid At 90?C for 45 min ,then placed in oven for 2 hours at 130 ?C, then diluted to desired volume

1- 0.2 g Unknown fish sample spiked with (2.5ml) 1000ppb arsenic standard, after dilution in 25 ml H2O,the theoretical value must be 100 ppb, but the practical value came out 75 ppb
2- 0.2 g Fish muscle certified reference material ,containing 12.7 mg/kg of arsenic, and since the dilution is in 50 ml, then the theoretical value must be 50.8 ppb, the practical value came out 0.57ppb

Knowing that both samples were treated in the same condition and in the same time, the difference in the end results is very weird, please advise concerning any note that can improve our work,
or detect any mistake has been made,
waiting for your reply,many thanks in advance

Related Discussions:- atomic absorption troublshouting

Particulate nature, how they occured

how they occured

What is tube extrusion, What is Tube extrusion Billet is placed insi...

What is Tube extrusion Billet is placed inside a container between die and mandel. Mandel is pressed by ram and metal is extruded through the die. This process is used for m

Mechanism, Libermaan''s nitroso reaction mechanism

Libermaan''s nitroso reaction mechanism

Water treatment, Scale and sludge formation in boiler

Scale and sludge formation in boiler

Separation of mixtures, name the easiest method of obtaining diesel from a ...

name the easiest method of obtaining diesel from a mixture of petrol and diesel.

Urea, What is the nature of urea? Is it acidic basic or neautral how can wr...

What is the nature of urea? Is it acidic basic or neautral how can wr verify it?

Which has highest second ionisation energy, Which has highest second ionisa...

Which has highest second ionisation energy? Electronic config of Na(+) is noble gas config. . so its very difficult to remove an electron so it will have very high 2nd ionisati

Phy chem, describe the various types of velocities?

describe the various types of velocities?

Define structure of cis-1-3-dimethylcyclohexane, The two chair conformation...

The two chair conformations of cis-1,3-dimethylcyclohexane

Acid and bases, How to find which compound is acid or basic. I need only a ...

How to find which compound is acid or basic. I need only a understanding or a basic tip or suggestin how to find whether a compound is an acid or base Ans) We can find a compound

Write Your Message!

Name

Email id

Message

Verfication Code

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd