Kinetics of Hydrolysis of Fenclorac

Won, Chong Min; Zalipsky, J.J.; Patel, Deval; Reavey-Cantwell, Nelson H.

doi:10.1002/jps.2600660118

Cited by 3 publications

(2 citation statements)

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“…Type 2 Calculation. In cases where an analytically significant intercept is found in a linear calibration curve and the type 1 percent bias error as calculated for the range desired is unacceptable, a calculation of the sample response to the standard response SJSr ratio range for an acceptable percent bias error may be made using the percent error function (13) within which all subsequent sample values are to be held. For an acceptable percent bias error of ±0.5%, the Sx/Sr ratio range of 0.90 to 1.15 is calculated as shown in Table IV.…”

Section: Predictive Calculationsmentioning

confidence: 99%

“…Some authors (10,11) have alluded to this indirectly by stating that "the use of a calibration standard at a single concentration assumes not only that the detector response is linear, but also that the calibration line goes through zero". Wittmer and Haney ( 12) and Won et al (13) state correctly after having shown that the intercept value was insignificantly low, that these data "indicate that the liquid chromatographic method can be used with a single-point standard". Authors such as Sondack ( 14) who states that "the extrapolation results passed through the origin" and King et al (5) who conclude "a standard graph rather than a one-point standard is required for maximum accuracy in the procedure" are examples of those who clearly understand the requirement.…”

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confidence: 96%

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Potential error in single-point-ratio calculations based on linear calibration curves with a significant intercept

Cardone¹,

Palermo²,

Sybrandt³

1980

Anal. Chem.

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Calculations based on a single-point standard linear calibration curve which has a finite intercept are a potential source of bias error. The error has been shown to be a function of magnitude of the slope and intercept, and the magnitude of the difference in the standard and sample responses. For maximum accuracy, the ratio of the difference in responses to the standard response should be the lowest possible. For any response curve, a reliable calculation of the percent error resulting from making a single-point-ratio calculation (SPRC) where a finite intercept exists is shown so that a decision as to its proper use or non-use may be made. In most cases, even when an analytically significant intercept is found in a linear calibration curve, the SPRC technique may stili be employed by calculating the sample signal to standard signal, S,/S, ratio range for an acceptable % error bias range. This calculation of the S,/S, ratio constitutes a trade-off between the use of a single standard and a shortened linear dynamic range with its possibility of more reanalyses against the use of the entire linear dynamic range with its mandatory requirement of more standards but the lesser possibility of reanalyses.

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Section: Predictive Calculationsmentioning

confidence: 99%

mentioning

confidence: 96%