Organic micropollutants in Rhine and Meuse a - Riwa

CONTENTS
SUMMARy 5
1 INTRODUCTION............................. 6
2 MEANING AND INTERPRETATION OF THE HPLC/UV FINGERPRINT 8
2.1 Scope of the HPLC-UV fingerprint 8
2.2 Assessment of the HPLC/UV fingerprint.................................................................... 9
3 METHODOLOGy 11
3.1 HPLC/UV analysis 11
3.2 Samples of water from the Rhine and Meuse 11
3.3 Processing of the data 12
4 QUALITY OF THE RHINE AND THE MEUSE 13
4.1 Overall quality 13
4.1.1 Sum of the peaks 13
4.1.2 Number of peaks 14
4.2 Individual compounds 16
4.3 Pesticides 16
4.4 HPLC/UV fingerprint as an early warning system: chlortoluron 18
4.5 HPLC/UV databases: 4,4'-dihydroxydiphenyl sulphone in the Meuse 19
4.6 Identification of unidentified peaks with HPLC/MS: diethylphthalate and
dibutylphthalate in the Rhine 20
4.7 Behaviour and occurrence of individual compounds 21
4.7.1 Compounds in both the Rhine and the Meuse 21
4.7.2 Compounds encountered only in the Rhine 23
4.7.3 Compounds encountered only in the Meuse 23
4.7.4 Notable monthly samples with reference to individual peaks 24
5 MEANING FOR THE WATER QUALITy 25
6 CONCLUSIONS 27
BIBLIOGRAPHY 29
APPENDIX 1
APPENDIX 2
APPENDIX 3
APPENDIX 4
APPENDIX 5
APPENDIX 6
Sampling data Rhine (Lobith) and Meuse (Eijsden)
Comparison of the HPLC/UV fingerprint at an absorption wavelength of 215
nm and at the wavelength with maximum absorption.
HPLC/UV fingerprint at 215 nm of the monthly Rhine samples at Lobith
HPLC/UV fingerprint at 215 nm of the monthly Meuse samples at Eijsden
Summed peak surface areas of the discrete peaks from the HPLC/UV
fingerprints for the Rhine
Summed peak surface areas of the discrete peaks from the HPLC/UV
fingerprints for the Meuse
RIIIN'A
3