Skip to content

Main content

Fluorescence Quenching Curvature One Point Tool

One-point residual against an explicitly supplied linear Stern-Volmer intensity model; no quenching mechanism is inferred.

Loading tool…

Description

Return Stern-Volmer ratio residual at one supplied point.

Optical and coupled-assay signals depend on blank subtraction, path length, dilution, calibration and linearity. A corrected ratio or local response slope can be calculated without establishing assay specificity, actual concentration or a biological/clinical result.

Return Stern-Volmer ratio residual at one supplied point.

When to use this tool

Use Fluorescence Quenching Curvature One Point when checking the stated biochemical optical or response-correction convention.

How to use the tool and how it works

  1. Enter unquenched, quenched, quencherConcentration, sternVolmer. 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 intensityRatio, linearPrediction, curvatureResidual. Use the output convention below.

Return Stern-Volmer ratio residual at one supplied point. Require unquenched/concentration/constant >= 0 and quenched > 0; intensityRatio = unquenched/quenched, prediction = 1+K*concentration, residual subtracts prediction.1

Input fieldMeaning and unitsAccepted input
unquenchedUnquenchedRequired. Finite number; minimum 0.
quenchedQuenchedRequired. Finite number; strictly above 0.
quencherConcentrationQuencher ConcentrationRequired. Finite number; minimum 0.
sternVolmerStern VolmerRequired. Finite number; minimum 0.
Output fieldInterpretationReturned shape
intensityRatioIntensity RatioRequired. Finite number.
linearPredictionLinear PredictionRequired. Finite number.
curvatureResidualOne-point ratio-minus-linear-model residual; does not establish actual response curvature.Required. Finite number.
json
{
  "input": {
    "unquenched": 100,
    "quenched": 40,
    "quencherConcentration": 2,
    "sternVolmer": 0.5
  },
  "output": {
    "intensityRatio": 2.5,
    "linearPrediction": 2,
    "curvatureResidual": 0.5
  }
}

Limitations and assumptions

  • One residual does not establish curvature, a quenching mechanism, a fitted constant or an experimental uncertainty.
  • 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.

Alternative or Complementary methods

Use calibrated measurements and an appropriate validated assay model, including interference, linearity and uncertainty, for substantive concentration or biological conclusions.

References

  1. Calculation and input contract: biochemistry/fluorescence-quenching-curvature-one-point — tool.io

Similar or alternative tools