Multiple choice

Which of the following is not true about the choice of element in internal standard method for determination in flame photometry?

  1. The element should give spectral lines that are close to those of the analysis element.

  2. The reference element can be added in any concentration to those of analysis element.

  3. The element must be one that is not present in the samples and must be available in a high state of purity.

  4. The reference element must produce radiations that are perfectly selectable.

  5. When added the element must not alter the physical properties of the solution.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This answer is correct as the given statement is false because the sample must be added in concentration very near to those of analysis element, so that radiations of approximately equal may be obtained.

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