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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
The maximum probability of finding an electron in the d xy orbital is: (1) Along the x-axis (2) Along the y-axis (3) At an angle of 45 0 degree from the x and y
Q. Requirements for the evaluation process? Some of the requirements to be kept in mind for the evaluation of the products are listed herewith: • People in a sensory test a
Preservatives: The preservatives avoid spoilage of food because of microbial expansion. The most common preservative employed is sodium benzoate; C 6 H 5 COON a It is metabol
Different Atomic Models
Q. What is chlorophyll? A magnesium complex of porphyrin is called chlotophyll. the green colouring material in plants and which is essential for photosynthesis. Hemoglobin
to study the presence of aroma taste,ph value and tannic acid of diffrent tea leaves
Unlike components of the 3 d series, 4 d and 5 d elements have little simple aqueous cationic chemistry. The main exceptions are La3+ and Y3+, and Ag+, which builds some soluble
Why was covalent compounds are insoluble in water and ionic compounds soluble in water? Ans) When ionic bonds form, one atom becomes positively charged, while the other becomes ne
give instrumentation of electrogravimetry
explain the synthesis of freon and westron i need only the synthesis of those coompound
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