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Nebulisation techniques:
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
Ion mobility: Ion mobility is related to molar conductivity by the equations: which allows the mobilities, u+ and u- of the cation and anion to be determined from mol
Which of the following is least ionic: (1) C 2 , H 5 Cl (2) KCl (3) BaCl 2 (4) C 6 H 5 +
1. why YbS and YbI2 are semiconducting solids but LaS and LaI2 show metallic character. 2. Why is aqueous solution of Eu2+ thermodynamically less susceptible to oxidation than any
Uses of alkyl isocyanides Because of their unpleasant smell, alkyl isocyanides are utilized in detection of very minute leakage. Carbylamine reaction is utilized as a test for
write a note on the oxide of 3d transition metal
Nature of metal carbon bond
in Cr atom the number of electron having n+m=3
Experiment on Archimedes' principle Solder a cycle valve to single half of a copper ball tap float. Load inside the other half with lead or lead shot unless the whole just flo
how to name the following compound and how to assign oxdiation state aof central metal ion : positive complex ion containing two cobalt metal atoms which are held by the bridges hy
Explain in words why hydroboration leads to anti-Markovnikov addition of hydrogen whereas most electrophilic addtions to alkenes result in Markovnikov addition.
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