Page:NIOSH Manual of Analytical Methods - 8301.pdf/5

 HIPPURIC and METHYL HIPPURIC ACIDS in urine: METHOD 8301, Issue 3, dated 15 March 2003 - page 5 of 5 TAB LE 1. OVE RAL L PR EC ISION, ACCUR ACY , AND BIAS Range Studied (µg/mL)

Estimated Accuracy (%)

Average

Hippuric acid

10-1000

16.0

-0.081

2-Methyl hippuric acid

10-1000

19.8

3-Methyl and 4-Methyl hippuric acids

10-1000

18.9

Compound

Bias

Overall Precision (ÖrT )

Instrument Precision (Sr)

-0.312-0.0237

0.0538

0.020

-0.099

-0.286-0.0141

0.0672

0.015

-0.097

-0.2959-0.3869

0.0615

0.011

Range

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition