Analyte    Normal levels    Toxic Levels    Fatality Levels   
 Benzoylecognine  0.611mg/L (Recreational use)  No data available  0.7-31mg/L
 Betahydroxybutyrate (BHB)  52mg/L  52-258mg/L  >258mg/L
 Bisoprolol  0.01-0.06mg/L  No data available  No data available
 Bromazepam  0.08-0.17mg/L  0.3-0.4mg/L  2mg/L
 Brotizolam  0.001-0.02mg/L  No data available  No data available
 Bupivacaine  0.25-3mg/L  4-10mg/L  No data available
 Buprenorphine  1-8ng/mL  1-29ng/mL  No data available
 Bupropion  0.025-0.1mg/L  0.17mg/L  0.45mg/L
 Butobarbital  2-15mg/L  14-98mg/L  No data available
 BZP  20-1200ng/mL  1340-2460ng/mL  >1700ng/mL
 Capecitabine  2.4-3.9mg/L (Peak)  No data available  No data available
 Carbamazepine  1.4-12.0mg/L  >15mg/L  >50mg/L
 Carbamazepine (Liver)  No data available  No data available  173mg/kg
 Carbazepine 10-Hydroxy  12-40mg/L  45mg/L  No data available
 Carboxyhaemoglobin  1-5% (Smoker 8-10%)  25-35%  50-60%
 Cathinone  74-180µg/L  Unknown  Unknown
 Chlordiazepoxide  0.4-4.0mg/L  3-10mg/L  20mg/L
 Chlordiazepoxide (Liver)  No data available  No data available  10-50mg/Kg

The Forensic Toxicology Service is pleased to supply the following analyte references ranges

These results are collated from a number of references. However, we cannot assume responsibility for the contents of these ranges and they are provided solely as a general reference resource
Bioanalytics and Forensic Toxicology