Forensic Lab Blank Correction Term Tool

Use Forensic Lab Blank Correction Term when you need one assay correction, signal ratio or subsample extrapolation.

1. Enter sampleSignal, blankSignal, calibrationSlope, dilution. Use the units and conventions below.
2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
3. Read correctedSignal, concentration. Use the output convention below.

Require nonzero calibrationSlope and positive dilution. Subtract blank from sample signal and multiply by dilution divided by calibration slope.^[1]

• Slope is signal per concentration unit and dilution is a multiplying correction. Negative results are retained; no recovery, detection limit or forensic inference is selected.
• Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
• Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Use the full validated laboratory method with traceable calibration, sampling and uncertainty records. A complete forensic conclusion requires appropriate source evaluation beyond one corrected quantity.

• Forensic Spectrum One Peak Ratio

  Subtract each baseline and divide corrected target by corrected reference.

• Forensic Balance Tare Uncertainty Term

  Return gross-minus-tare and square root of max(0,uGross²+uTare²-2ρuGrossuTare).