Labs have a very specific shape of recurring question: “give me every sample above the MDL for parameter X in the last reporting period”. Here are five of the most common, pre-built for EQQ.

1. Samples exceeding MDL by method

2. QC out-of-control list

3. Turnaround time by analyst

4. Chain-of-custody breaks

5. Client portal pull-list for the month

The Use Queries page is where chemists run pre-built lab queries.
The Use Queries page is where chemists run pre-built lab queries.

Each query uses EQQ Functions like fQQ_ReportingPeriod(@AsOf) and fQQ_MDLCompare(@result, @mdl) so the math is consistent across the lab.

Compliance bonus

All five queries are marked Active and audited. If an external auditor asks how you computed “percent exceeding MDL”, the answer is: “we ran query #12, here is the SQL, here is the run log, here is the exported file.”

Want to see it live? Book a 30-minute demo - we connect EQQ to your database and build a query with you. Book a Demo →

Key Terms

  • MDL - Method Detection Limit - the lowest concentration reliably detected by the analytical method.
  • QC - Quality Control - the process of verifying that test results meet predefined accuracy and precision criteria.
  • TAT - Turn-Around Time - the elapsed time between sample receipt and final result reporting.
  • COC - Chain of Custody - the documented sequence of possession, transfer, and handling of a sample from collection to disposal.