Materials and Methods
Sample Collection and
Description
The terms “supplier” and “suppliers” used in this document and the
statistical data and charts is analogous with “manufacturer(s).” All
suppliers are the original CPHSO manufacturer in this study. The
researcher excluded distributors and resellers from the study to
understand the characteristics of CPHSO manufactured in North America
vs. what could be purchased on the open market and sourced from a wide
variety of countries and locales.
Manufacturers voluntarily submitted CPHSO samples with supporting
documents (e.g., COAs) directly to the analytical laboratory following
the prescribed procedures for a GLP study. Eight firms provided a total
of thirty-four samples for study. Four samples from a single
manufacturer were excluded from the study due to excess solids in the
oil. The final data set included thirty samples from two Canadian
manufacturers and five American manufacturers. Table 1 provides a
summary of the samples included in the study.
Table
1: Summary of samples investigated