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