How do you select the appropriate dSPE kit for the QuEChERS method?

dSPE kit is selected based on the nature of your sample.  Samples with high water content but only lightly pigmented and contain no fats, such as apples, oranges, lettuce, can use the MgSO₄/PSA kit.  Samples that are rich in fats and waxes but only lightly pigmented, such as coconuts, avocados, nuts, seeds, can use the MgSO₄/PSA/C18E kit.  Samples that are pigmented and contain little fats such as spinach, berries, peppers, can use the MgSO₄/PSA/GCB kit.  For samples that are rich in both pigment and fats, such as chocolate, black olives, can use the MgSO₄/PSA/GCB/C18E kit.