Posts by Ned
False Positives: Ordering Sterile vs Nonsterile Specimen Cups for Labs
This test by test guide helps lab staff choose sterile or nonsterile specimen cups, with handling, transport ratings, and ordering tips.
Avoid OSHA Fines: SOP Steps for U.S. Clinics to Dispose Used Drug Tests
U.S. compliance steps for clinics, labs and employers: when used drug tests become regulated, safe disposal methods, and a simple SOP.
5 ng/mL Tests Detect Cocaine in Urine 17–22 Days After Use
Evidence-based guide to urine cocaine detection: how assay cutoffs and 5 ng/mL sensitivity can show benzoylecgonine 17–22 days after use and when to confirm.
From Cup to Bench: Nitrite Adulterant Test Workflow for Forensic Labs
Practical workflow for forensic labs: link cup spot tests and SVT strips to quantitative nitrite confirmation (200/500 mg/mL) and MS biomarker backup.
Up to 102 Days: THC Detection Time in Urine and What Labs Use
Learn realistic urine detection windows for THC, how lab cutoffs and GC‑MS confirmation affect results, and what actually helps before a test.
300 ng/mL Opiate Screens Miss Oxycodone: A Clinician’s Two Tier Plan
Clinician two tier testing to avoid oxycodone false negatives: when to add oxycodone specific screens and when to order confirmatory chromatography.
Benzo Detection Time for Labs: Test Windows, Cutoffs, Confirmation
How long benzodiazepines register in urine, blood, saliva, and hair. Lab focused guidance on cutoffs, confirmation testing, and screening kits.
Nitrite Drug Test: Read 200–500 µg/mL Cutoffs and When to Confirm
SVT guide for collectors and labs: interpret 200–500 µg/mL nitrite cutoffs, confirm with quantitative testing, and preserve aliquots and chain of custody...
Three-Hour Window, 40 Ounces: U.S. DOT Shy Bladder Rules & Paperwork
Read the U.S. DOT shy bladder steps, the three-hour/40-ounce limits from 49 CFR Part 40, and the exact documentation CDL drivers should keep to protect...
1 in 5 Fentanyl Analogs Go Undetected by Test Strips for Harm Reduction
Practical harm reduction guidance on fentanyl analog test strips: which analogs can be missed, how to prepare concentrated samples, read faint lines, and...