Question

which technique has the lowest detectiob limit
A) gravimetric B) Conductometric
C) Visible spectrometric D)Atomic absorption spectrophotometric

Answer 1

A) Gravimetric
it involves many processes, and here there is the human factor. In most cases, the analyte must first be converted to a solid by precipitation with an appropriate reagent. The precipitate can then be collected by filtration, washed, dried to remove traces of moisture from the solution, and weighed. The amount of analyte in the original sample can then be calculated from the mass of the precipitate and its chemical composition.