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

Uses of urea or carbamide - carboxylic acids, Uses of Urea or Carbamide - C...

Uses of Urea or Carbamide - Carboxylic Acids (a) Urea is used mainly as a nitrogen fertilizer. It has 46.4% nitrogen. (b) Urea is used in the manufacture of formaldehyde-ure

Goc, homolytic fission

homolytic fission

Inorganic chemistry, dipole moment of para.nitro aniline is 6.10 D.why

dipole moment of para.nitro aniline is 6.10 D.why

Cool experipints, how do you make a maltycouler water

how do you make a maltycouler water

Titration, How are standard solutions prepared in industries?

How are standard solutions prepared in industries?

What is the organic chemistry?, It is a part of chemistry which deals with ...

It is a part of chemistry which deals with the organic compounds formed by carbon , hydrogen ,oxygen.

Define functional food, Q. Define functional food? Functional food is a...

Q. Define functional food? Functional food is a food that has a component incorporated into it to give a specific medical or physiological benefit, other than a purely nutritio

Qualitative analysis, why HNO3 is not used for detection of acidic radical ...

why HNO3 is not used for detection of acidic radical of 1st and 2nd group ions?

Cu2+ will have the following electronic configuration, Cu 2+ will have the...

Cu 2+ will have the following electronic configuration: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 3d 10 , (2) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 9 , 4s 1 (3) 1s 2 , 2s 2 ,

How do you determine the oxidizing or reducing agent, Q. How do you determi...

Q. How do you determine the oxidizing or reducing agent? Ans. A substance that oxidizes another substance is called an oxidizing agent. One that reduces another substance

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