Follow-up
QC cutoffs confirmation - Williams, Carla <Carla.Williams@bmc.org>
Oct 02, 2025 09:13 AM
Hi Carla,
Thanks for the details. I reached out to our quoting team, and to proceed they need your confirmation that the proposed targets relative to your negative cutoffs will work. Based on your list, we suggest the following (≈ ±30% from cutoff to avoid borderline results):
Analyte Proposed Negative QC Proposed Positive QC Units
Amphetamine 700 1300 ng/mL
Secobarbital 140 260 ng/mL
Oxazepam 140 260 ng/mL
Buprenorphine 3.5 6.5 ng/mL
THC 35 65 ng/mL
Cocaine 210 390 ng/mL
Fentanyl 0.7 1.3 ng/mL
Methadone 210 390 ng/mL
Morphine 210 390 ng/mL
Oxycodone 70 130 ng/mL
UTAK’s standard recovery guarantee is ±25% from target unless otherwise specified.
Could you please confirm these targets are feasible, or note any analyte/level changes (e.g., different class representatives for barbiturates/benzodiazepines)?
My notes from your emails—please confirm:
• Matrix: Urine
• Form: Frozen (~18-month shelf life)
• Quantity: 5 packs Positive and 5 packs Negative (each pack = 10 × 10 mL; total 10 packs)
• Ship to: 235 N Pearl St, Brockton, MA 02301
• Carrier acct: #004955
Once you confirm, I’ll have the formal quote issued right away.
Thank you,