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. 2016 Sep 20;40(8):583–587. doi: 10.1093/jat/bkw080

Table VII.

Opiates that did not cross-react with the Lin-Zhi HEIA at both cutoffs

Compound Highest concentration tested (ng/mL) Compound Highest concentration tested (ng/mL)
Norcodeine 20,000 O-desmethyltramadol 25,000
6-MAM 10,000 N-desmethyltramadol 25,000
Propoxyphene 33,000 EMDP 20,000
Norpropoxyphene 33,000 Methadone 20,000
Meperidine 3,000 Ketamine 20,000
Normeperidine 3,000 Norketamine 20,000
Buprenorphine 1,000 Fentanyl 5,000
Norbuprenorphine 1,000 Norfentanyl 5,000
Tramadol 25,000 Heroin 10,000
Nortramadol 25,000