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

Iodoform, chemical equation of K2CO3+CH#CH@OH+I2

chemical equation of K2CO3+CH#CH@OH+I2

Graham''s law, a nitrogen molecule travel at about 505 m/s at room temperat...

a nitrogen molecule travel at about 505 m/s at room temperature. find the velocity of a helium atom at the same temperature

How to develop a new product, How To Develop A New Product The proces...

How To Develop A New Product The process of developing a new product comprises three phases, namely formulation or recipe development, standardization of processing methods,

Organic, preparation of iodoform in lab

preparation of iodoform in lab

Metal halide, why pcl3 is less polar than sicl4

why pcl3 is less polar than sicl4

Number of neutrons in heavy hydrogen atom is, Number of neutrons in heavy h...

Number of neutrons in heavy hydrogen atom is: (1) 0 (2) 1 (3) 2 (4) 3 Ans: 1

Chemical answers, 1. Enter the symbol of a sodium ion, Na+, followed by the...

1. Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42- ..Express your answers as ions separated by a comma. 2.Enter the expression 147N+a, wher

The configuration, The configuration 1s 2 2s 2 2p 5 3s 1 shows: (1...

The configuration 1s 2 2s 2 2p 5 3s 1 shows: (1) Excited state of O 2 - (2) Excited state of neon (3) Excited state of fluorine (4) Ground state of fluorine ato

Illustrate classification of emulsions, Q. Illustrate Classification of Emu...

Q. Illustrate Classification of Emulsions? Emulsions are classified as: • Oil-in-water emulsion: This is a colloidal dispersion in which droplets of oil are dispersed in

Describe about oxides, Q. Describe about Oxides? As said before, oxygen...

Q. Describe about Oxides? As said before, oxygen reacts practically with all the elements in the periodic table, except Lighter noble gases, to form binary compounds called oxi

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