Page:NIOSH Manual of Analytical Methods - 5043.pdf/4

 p-TOLUENESULFONIC ACID: METHOD 5043, Issue 1, dated 15 January 1998 - Page 4 of 4 6 mL of the isopropanol had evaporated, and the remaining 14 mL was cold because of evaporation. Separate recovery experiments were performed. The average recovery of 3-µg quantities ofptoluenesulfonic acid from 20-mL volumes of fortified isopropanol was 1.04 (Sr = 0.054 for 6 samples); the average recovery of 6-µg quantities ofp-toluenesulfonic acid from20-mL volumes of fortified isopropanol was 1.01 (Sr = 0.028 for 6 samples). After 29 days of storage at room temperature, the average recovery of 3-µg quantities of p-toluenesulfonic acid from 20-mL volumes of isopropanol was 0.95 (S r = 0.050 for 6 samples). This alternative method and the method with glass fiber filters both have the same LOD and LOQ, because final sample solution volumes in the two methods are the same.

REFERENCES: [1] [2] [3]

[4]

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Tucker SP [1997]. Backup data report for method 5043,p-Toluenesulfonic Acid. National Institute for Occupational Safety and Health, DPSE/NIOSH, (Unpublished report). Tucker SP [1996]. Analytical report for Sequence #8567, DPSE/MRSB. Cincinnati, OH: National Institute for Occupational Safety and Health. ( Unpublished report). Lange FT, Wenz M, Brauch H [1995]. Trace-level determination of aromatic sulfonates in water by online ion-pair extraction/ion-pair chromatography and their behavior in the aquatic environment. J High Resolut Chromatogr18:243-252. Altenbach B, Giger W [1995]. Determination of benzene- and naphthalene sulfonates in wastewater by solid-phase extraction with graphitized carbon black and ion-pair liquid chromatography with UV detection. Anal Chem67:2325-2333. Bastian B, Knepper TP, Hoffmann P, Ortner HM [1994]. Fresenius’ J Anal Chem 348: 674-679. Brouwer ER, Slobodnik J, Lingeman H, Brinkman UAT [1992]. Analusis 20: 121-126. Schullerer S, Brauch HJ, Frimmel FH [1990]. Vom Wasser75:83-97.

METHOD WRITTEN BY: Samuel P. Tucker, Ph.D., NIOSH/DPSE

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition