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the claim

The Horwitz equation predicts the variability or precision of analytical measurements as a function of analyte concentration.

the verdict

SUPPORTED

the evidence backs this

confidence 83/100

The Horwitz equation is widely utilized in analytical chemistry and collaborative studies to predict measurement precision and variability as a function of analyte concentration, forming the basis for metrics such as the HORRAT ratio.

Evidence for · 2

A Simple Method for Evaluating Data from an Interlaboratory Study

1998 · cited by 19

Paper [2] discusses evaluating interlaboratory studies by calculating the HORRAT ratio using the relative standard deviation calculated from the Horwitz formula.

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More for · 1

An Interlaboratory Comparison Study of Regulated and Emerging Mycotoxins Using Liquid Chromatography Mass Spectrometry: Challenges and Future Directions of Routine Multi-Mycotoxin Analysis including Emerging Mycotoxins.

2022 · cited by 3

Paper [9] describes analyzing data statistically by calculating a target standard deviation following a modified Horwitz equation.

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first checked01 Aug 2026

judged → SUPPORTED · 8301 Aug 2026

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