THE RELATIONSHIPS BETWEEN PLASMA SPECIFIC GRAVITY, PLASMA PROTEIN CONTENT AND EDEMA IN NEPHRITIS

Abstract

0.1% accuracy) semi-micro method has been met. The method should be applicable to any body fluid. Extensive use is made of the atomic absorption detector in the measurement of mercury vapor levels in the atmosphere. The active part of this detector is the optical cell and the air in the optical cell is generally considered to represent the atmosphere being sampled, but only if the mercury concentration remains constant. If it is not constant, the concentration in the optical cell will be changing continuously and will not be equivalent to the concentration in the sampled atmosphere at any given time. This occurs because there is a finite time associated with achieving a uniform concentration in an optical cell following a step change in input and this mixing time is a function of a number of parameters. These parameters can be selected and used in instrument design to achieve a desired mixing time. We speak of mixing time because time is a parameter which can be measured, but what is really desired is to achieve a certain percentage (usually 99% or 99.9%) of the true atmospheric concentration in given time.