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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
Number of nodal centres for 2s orbital: (1) 1 (2) 0 (3) 4 (4) 3 Ans: 1
The amount of energy needed to convert one mole of solid substance to vapor state is known as Sublimation energy
Conjugate-base anion of diethyl malonate The conjugate-base anion of diethyl malonate would be formed with sodium ethoxide, but it would not react with bromobenzene due to the
Q. Describe Linkage Isomerism? Some ligands can coordinate to the metal through different donor ato...s present in the ligand. They are called ambidentate ligands and they can
Halogen Containing Compounds Compounds that are derived from hydrocarbons by the replacement of one or more than one hydrogen atoms by the corresponding number of halogen atoms
Why is ammonium (NH4) seperately placed in zeroth group in detection of basic radical in qualitative analyisis?
eq. weight of Br in Br2 --> Br- +BrO3-
Chemical formula for calcium pyrophosphate is ca 2, P 2 O 1. The formula for ferric pyrophosphate will be: (1) Fe 3 (P 2 O 1 ) 3
on what basis basic radicals are separated into six groups ?
Test of proteins - Nitroprusside test Nitroprusside test : Proteins consisting of -SH group give this test. While sodium nitroprusside solution is added to proteins comprising
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