The composition of each of the individual sterols and of the erythrodiol and uvaol should be expressed to one decimal point.

Total sterol composition must be expressed without any decimal point.

${\mathrm{sterol}}_x=\frac{A_x}{\sum A}\times 100$

where:

A_x

peak area for x;

ΣA

total peak area for sterols.

Apparent β-sitosterol: Δ5-23-stigmastadienol + clerosterol + β-sitosterol + sitostanol + Δ5-avenasterol + Δ5-24-stigmastadienol.

$\mathrm{Erythrodiol}+\mathrm{Uvaol}=\frac{\mathrm{Er}+\mathrm{Uv}}{\mathrm{Er}+\mathrm{Uv}+\mathrm{\Sigma A}}\times 100$

where

ΣA

sum area for sterol in computing system counts;

Er

area of Erythrodiol in computing system counts;

Uv

area of Uvaol in computing system counts;