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Trace and ultratrace analysis:
The accuracy, precision and detection limits of flame AAS depend on how the analyte sample is introduced into the atomiser. We need to transfer a reproducible and representative portion of a sample into an atomiser which depends on the physical and chemical state of the analyte and the sample matrix. The sample introduction is achieved with the help of a nebuliser. The generally used nebulisation techniques are ultrasonic nebulisation, pneumatic nebulisation, electrothermal vaporisation and hydride generation.
Atomic absorption spectrophotometry (AAS) is now a routinely and widely employed technique for trace and ultratrace analysis of complex matrices of geological, biological, glass, environmental, industrial, cement, marine sediment, pharmaceutical, engine oil or any other kind of samples. An atomic absorption techniques using flame are rapid and precise and are applicable to about 67 elements. The electrothermal methods of analysis instaed are slower and less precise; thus, these are more sensitive and require much smaller samples.
What are three modifications to a polymer that can make it transparent? How will these modifications affect the mechanical properties of the polymer?
Fe3+ + e ------> Fe2+
how to make assignmant//
electron affinity of nitrogen is positive but of phosphorus it is negative why I that
Describe why shielding is more effective by electrons in a shell of lower principle quantum number than by electrons having the similar principle quantum number.
Define Advancement and charge - Cell Diagrams? The electron number or charge number, z, of the cell reaction is defined as the amount of electrons entering at the right termina
how ti find numbeer of neutrons in dipositive zinc ion with mass number 70?
Physical properties of nitroalkanes
The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is: (1) 17 (2) 37 (3)2 (4)38 Ans: 17
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