Which of the following may result in errant sodium results being reported by the laboratory when using a glass ion-selective electrode?

Question

Quizplus · Accepted Answer

All measurements by ion-selective electrodes are temperature dependent.Therefore, standards used for calibration and patient samples must be analyzed at the same temperature.In addition, with the glass sodium electrode being in constant contact with patient samples during each analysis, there will be a buildup of protein on the glass over time, which is known as electrode fouling.Electrode fouling will prevent the ion-selective phase from properly interacting with the sample, resulting in errant results.Also, highly acidic urine samples are known to be problematic for glass sodium ion-selective electrodes.

Which of the Following May Result in Errant Sodium Results