Liquid chromatographic-tandem mass spectrometric determination of nonylphenol polyethoxylates and nonylphenol carboxylic acids in surface water.
This paper presents a new LC-MS-MS method for the determination of the concentration of nonylphenol ethoxylates (NPEOs) and nonylphenol carboxylic acids (NPECs) in surface and drinking water using a reversed-phase column, which is fast and specific by nature. This method allows the simultaneous analysis of the two families of compounds in the same extract. Liquid-solid extraction of 100 ml of sample is performed on graphitized carbon black (GCB) cartridges. Reversed-phase chromatography is performed on a C8 column with isocratic elution. The electrospray interface is used to monitor the [M+NH4]+ ion for NPEOs and the [M-H]- ion for NPECs. Detection limits range from 0.01 to 0.05 microg/l for NP(1-17)EOs and are 0.01 microg/l for NP(1-2)ECs. Mean recoveries range from 78 to 107% with relative standard deviations ranging from 6 to 16%. Applicability of the method is demonstrated by results from a monthly sampling of river water at 11 sampling points located downstream of suspected polluting industries in Quebec (Canada).
Centre d 'Expertise en Analyse Environnementale du Québec, Sainte-Foy, Canada. francois.houde@menv.gouv.qc.ca
François
F
Houde
Christian
C
DeBlois
David
D
Berryman
D002264:Carboxylic Acids / Q000737:chemistry*; D002853:Chromatography, Liquid / Q000379:methods*; D005026:Ethylene Glycols / Q000032:analysis*; D012015:Reference Standards; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D002264:Carboxylic Acids; D005026:Ethylene Glycols; D014874:Water Pollutants, Chemical; C021754:terics