DETERMINATION of the serum sodium has assumed a position along with blood sugar and blood urea nitrogen as a routine diagnostic procedure for severely ill patients. If the serum concentration of ...

Compared to simple laboratory tests, instrumental methods of analysis may give improved: A solution containing sodium ions gives a reading of four units on the flame photometer. Use the ...

Serum and urine sodium concentrations were measured with internal standard flame photometry. Normal values for serum sodium concentrations in this laboratory are 135 to 145 milliequiv. per liter.