Hello all. I’m new to the forum. I was wondering if anyone has had any issues with D9 THC testing in TF CBD crude oil. We are working on thc remediation and are getting conflicting results. Our internal HPLC-UV results show the same levels of D9 THC before and after remediation. We sent a tincture that was made with this TF crude to a third party lab that uses UPLC-UV and they told me that although they see three peaks in the region, there is D9 Thc based on their reference chromatograph. Another third party lab that we sent the non-diluted TF crude states that there is no D9 Thc as supported by their LC-MS testing.
After dealing with a lot of third party labs, I’m a bit suspicious of how accurate a lot of these labs are especially seeing very high reported LOQs for THC. Wasn’t sure if anyone else is in the same boat. Possibly some isomerization but without knowing why, I’m not sure if there are any safety concerns.