Multiple choice

Which of the following is not true about calibration curve method for determination in flame photometry?

  1. Calibration curves are always linear.

  2. In case of high total concentration of solids in the flame the burner may be fouled.

  3. Higher viscosity of sample should be avoided.

  4. If the solution is diluted excessively, errors of dilution may occur and signal to noise ration may decrease.

  5. For an unknown element X in a given sample, it is desirable to know that portable range of concentration of X in the sample.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct as calibration curves are not necessarily linear. It is found that curves for a given element are linear over a limited range. At stronger concentrations, the same element would give a curved calibration.

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