If one wishes to measure total As, As+3 and As+5 in a sample the most suitable analytical tool is
A. Atomic absorption spectrophotometer
B. Ion chromatograph
C. Scanning electron microscope
D. Gas chromatograph
Answer: Option A
A. Atomic absorption spectrophotometer
B. Ion chromatograph
C. Scanning electron microscope
D. Gas chromatograph
Answer: Option A
Which concentration of ethanol (ethyl alcohol) is the most effective as a disinfectant?
A. 100%
B. 70%
C. 50%
D. 25%
Which of the following method works primarily by denaturing proteins?
A. Ultra filtration
B. Heat
C. UV radiation
D. None of the above
Dioxins and furans are two toxic gaseous pollutants which can be measured by
A. GC - MS
B. TLC
C. ICP - AES
D. AAS
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