Result limits & flags

Limits tell Quanto when a result or curve point is outside what you accept. After Analyze, flags show up on results and in Method Validation.

Recovery on known doses

When a bottle has a known dose (Calibration, QC, and any other bottle you treat as known):

Field	Formula / meaning
RecPct	`100 × calculated concentration / dose`
DevPct	`RecPct − 100`
RecFlag	Pass/fail against the recovery limits you set

There is no separate Spike sample type in the bottle list — put the known amount on Dose (for standard addition, use the spike increment). See Set up an analysis and CalGroup & standard addition.

ISTD and ESTD curves both produce concentrations that feed RecPct the same way once a dose is present.

Curve and response limits

Limit	Typical use
MinCurveR2	Minimum acceptable coefficient of determination for the fit
MinRsp / MaxRsp	Response (area or height) window for a peak
MinQValue	Minimum qualifier / confirmation value
Qualifier counts	How many qualifiers must pass
MinCoElution	Minimum co-elution / overlap score when the method uses it
AboveCurveMaximum	Flag when the result sits above the top calibrator
PassFailFlag	Overall pass/fail roll-up for the result

Set these on the method / Quant tables before Analyze. Names match the columns you see in Quanto; leave a limit empty when you do not want that check.

Concentration limits

Set TooLow, Low, and High on Quant, Limit-group limits, or the Requested matrix. Headers are TooLow and Low; tooltips say TooLow is usually LOD or Trace, and Low is usually LOQ. FastPositive, carry-over, and concentration flags use Low (and TooLow where the detection-vs-quant band matters). There is no separate reporting-limit (RL) field.

Unknown-sample results can show a text form of final concentration (Results grid FConc text, Key Review SuperCell, reports via Result.FinalConcentrationText):

Situation	Display
Method No-peak text is set (Properties → Results), there is no usable peak, and there is no FConc override	That text (example: `n.d.`)
Method TooHigh prefix is set and the result is TooHigh / at or above High	Prefix + formatted High (example: `> 10`)
Method Below-Low prefix is set and reported concentration is below Low	Prefix + formatted Low (example: `< 1`)
Otherwise (empty option, or none of the cases above)	The usual numeric final concentration

Numeric FConc / Result.FinalConcentration in reports and Key Review sums is the effective reported value: a finite Results FConc override when the analyst typed one, otherwise Native × Dilution. This is not the five-level ConcentrationFlag (TooLow / Low / None / High / TooHigh).

User override of final concentration

Results FConc is editable. Type a number to store Result.ManualFinalConcentration (batch TSV on the result row). Clear the cell — or Key Review context menu Clear FConc override — to restore computed Native × Dilution. Analyze refreshes the computed value and does not clear the override.

When an override is set:

Reports (Result.FinalConcentration / FinalConcentrationText), Key Review SuperCell text, Amount / group numeric sums, and the Concentration flow FinalConc card use the override.
FConc text skips no-peak text (the analyst supplied a number); TooHigh / below-Low prefixes can still apply.
Sample-key auto ranking still uses computed Native × Dilution so an override does not change which SuperCell is auto-picked.
The Results FConc cell is tinted; Key Review flags include Override; the flow FinalConc caption reads Manual override.

Where flags appear

Results grid — per sample / Quant
Method Validation pane — method-wide scan
Reports — include flag / RecPct columns with Q. functions when your workbook needs them (Report formulas)

Practical tips