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

What is gamma radiation, Q. What is gamma radiation? The third kind of ...

Q. What is gamma radiation? The third kind of radiation is gamma radiation (g-radiation) which is high-energy electromagnetic radiation. Gamma radiation is typically emitted

Purification of water, Q. What are the requirements of drinking water? Ex...

Q. What are the requirements of drinking water? Explain various methods used for the sterilization of water for municipal supply. ANS. Requirements of drinking water: The e

Corrosion, classification corrosion

classification corrosion

Stoichiometry, The base "G" in DNA is guanine. a 15 ug sample of guanine i...

The base "G" in DNA is guanine. a 15 ug sample of guanine in excess oxygen resulting in 21.84 ug of CO2, 4.47 ug of H2O, and 22.83 ug of NO2. How many grams of carbon does 15 ug

Polymers, .

.

Electro chemical, application

application

Calculate the slope of a line from data points, Q. Calculate the Slope of a...

Q. Calculate the Slope of a Line from Data Points? Compute the slope of a line that contains these data points (3.0 cm 3 , 6.0 g) and (12 cm 3 , 24 g). To compute the slope of

Laws of chemical combination, A hydrogen-filled balloon was ignited and 2.0...

A hydrogen-filled balloon was ignited and 2.00 of hydrogen reacted with 16.0 of oxygen.

Explain two characteristic superstructures, If lipids are mixed with water,...

If lipids are mixed with water, what aggregates can they form? Explain two characteristic superstructures which are commonly found in biological systems, containing our food. How i

Reading IR, i need help reading this IR chart to figure out what the compou...

i need help reading this IR chart to figure out what the compound is

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