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

Periodicity, characteristics of group 13 elements

characteristics of group 13 elements

Dynamic Nature Of Equilibrium, Examples

Examples

Online tutor, I need online tutor job

I need online tutor job

Determine the empirical formula, Given the following mass percent compositi...

Given the following mass percent compositions, determine the empirical formula: 49.5% C; 5.2% H; 28.8% N; 16.5% O.

Ideal gas, what will be presure if tempreture is -73?

what will be presure if tempreture is -73?

Electrochemistry and ion concentration, ELECTROCHEMISTRY AND ION CONCENTR...

ELECTROCHEMISTRY AND ION CONCENTRATION Activity dependence of cell voltage: Measurement of galvanic cell potentials away from the standard state provides a convenient me

Discuss cohesive energy and electron affinity, Discuss "cohesive energy" an...

Discuss "cohesive energy" and "electron affinity". ‘Cohesive energy’: In a chemical bond, it’s the energy required to dissociate a solid into isolated atoms or molecules as ap

The number of unpaired electrons, The number of unpaired electrons in 1s 2...

The number of unpaired electrons in 1s 2 2s 2 2p 4 is: (1) 4 (2) 2 (3) 0 (4) 1 Ans: 2

Analytical chemistry, What is T in the indicator Eriochrome Black-T used fo...

What is T in the indicator Eriochrome Black-T used for the determination of hardness of water?

Define the term wheat bran, Wheat bran The useful role of wheat bran ...

Wheat bran The useful role of wheat bran in promoting regularity in colonic function and preventing constipation is generally accepted. In addition, growing research has focu

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