By mass and molarity Reference ranges for blood tests

reference ranges blood tests, sorted logarithmically mass above scale , molarity below.

hormones predominate @ left part of scale, shown red @ ng/l or pmol/l, being in low concentration. there appears greatest cluster of substances in yellow part (μg/l or nmol/l), becoming sparser in green part (mg/l or μmol/l). however, there cluster containing many metabolic substances cholesterol , glucose @ limit blue part (g/l or mmol/l).

the unit conversions of substance concentrations molar mass concentration scale above made follows:

numerically: molar concentration x molar mass = mass concentration
measured directly in distance on scales:

log

10


⁡



molar~mass

1000


=


distance~to~right~(decades)




{\displaystyle \log _{10}{\frac {\textit {molar~mass}}{1000}}={\textit {distance~to~right~(decades)}}}

, distance direct (not logarithmic) distance in number of decades or octaves right mass concentration found. translate mass molar concentration, dividend (molar mass , divisor (1000) in division change places, or, alternatively, distance right changed distance left. substances molar mass around 1000g/mol (e.g. thyroxine) vertically aligned in mass , molar images. adrenocorticotropic hormone, on other hand, molar mass of 4540, 0.7 decades right in mass image. substances molar mass below 1000g/mol (e.g. electrolytes , metabolites) have negative distance, is, masses deviating left.

many substances given in mass concentration not given in molar amount because haven t been added article.

the diagram above can used alternative way convert substance concentration (not normal or optimal ones) molar mass units , vice versa substances appearing in both scales, measuring how horizontally displaced 1 (representing molar mass substance), , using same distance concentration converted determine equivalent concentration in terms of other unit. example, on monitor, horizontal distance between upper limits parathyroid hormone in pmol/l , pg/ml may 7 cm, mass concentration right. molar concentration of, example, 5 pmol/l therefore correspond mass concentration located 7 cm right in mass diagram, is, approximately 45 pg/ml.