The graph below shows the calibrated response of three different ion selective e

Question

The graph below shows the calibrated response of three different ion selective electrodes to different concentrations of potassium (K + ) and sodium (Na + ). The error bars for each data point are smaller than the size of the points. The standard deviation of the blank measurement is less than plusminus 2 mV for each electrode. Based on the provided data, which of the three electrodes is most suitable for the quantitative measurement of [K + ] directly in blood serum: Electrode A, Electrode B, or Electrode C? This questions is worth 1 point. Hint: think about the sample (1 mEq = 1 mM).

Explanation / Answer

Electrode A(K)+ is the right option as its knee of curve is good and give desire result.

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