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

Elimination reactions - chemical properties alkyl halides, Elimination reac...

Elimination reactions - Chemical Properties Alkyl Halides The positive charge on carbon is promulgated to the neighbouring carbon atoms through inductive effect. While moved to

S block, #bonding in KO2question..

#bonding in KO2question..

Noble gas, please help me to do assignment about noble gas.

please help me to do assignment about noble gas.

Chemical kinetics, solvent rates on the rate of reaction

solvent rates on the rate of reaction

Common name of alkyl groups, How to give a common name of alkyl groups?

How to give a common name of alkyl groups?

Chemotherapy - chemistry in action, Chemotherapy - chemistry in action ...

Chemotherapy - chemistry in action The phrase chemotherapy that literally means chemical therapy or chemical treatment was coined in the year 1913 by Paul Ehrlich, the father o

Assignment beginning, Is this a excellent beginning for my assignment Most...

Is this a excellent beginning for my assignment Most Australians who own a pool, have saltwater pools, which are basically pools where the water have salt (NaCl) dissolved into th

Potentiometry, Lab Report Report the mass of KCl and KI in the original unk...

Lab Report Report the mass of KCl and KI in the original unknown sample. Include plot of titration. How do I calculate amount in unknown from titration and what is the curve suppos

Explain interval scales, Interval Scales An alternative approach is to...

Interval Scales An alternative approach is to rate liking on a proper interval scale or on a continuous line - scale, with only the ends of the scale being labeled " extreme

Atmospheric pressure, chemical reaction needed to lift a balloon

chemical reaction needed to lift a balloon

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