Covers a method of determining the organic plant treatment agents in drinking and ground water by means of high performance liquid chromatography with UV detection, following solid-liquid extraction. Applies to the determining of selected plant treatment agents and some of their main degradation products (metabolites) in drinking water. ALSO NUMBERED AS BS 6068-2.61(1997)

This International Standard describes a method for the determination of organic plant treatment agents in drinking and ground water using high performance liquid chromatography (HPLC) with UV detection after solid-liquid extraction. The method described in this International Standard is applicable to the determination of selected plant treatment agents and some of their main degradation products (metabolites) in drinking water with a validated reporting limit of about 0,1µg/l. Limited additional data indicate that it can be extended to 0,05µg/l (see table1 for examples). The method may be extended to include additional substances and ground water, provided the method is validated for each individual case. The selection of the plant treatment agents and main degradation products in table1 has been made according to the knowledge at the time of the interlaboratory trial (1992). Data for some other substances are given in annexA. Table1 Plant treatment agents to which this International Standard applies Name Molecular formula Molar mass CAS No.1) Substance family2) Atrazine C8H14CIN5 215,7 001912-24-9 T Chlorotoluron C10H13CIN2O 212,7 015545-48-9 H Cyanazine** C9H13CIN6 240,7 021725-46-2 T Desethylatrazine* C6H9CIN5 186,6 006190-65-4 T Diuron C9H10CI2N2O 233,1 000330-54-1 H Hexazinone** C12H20N4O2 252,3 051235-04-2 T Isoproturon C12H18N2O 206,3 034123-59-6 H Linuron C9H10CI2N2O2 249,1 000330-55-2 H Metazachlor C14H16CIN2O3 277,8 067129-08-2 A Methabenzthiazuron C10H11N3OS 221,3 018691-97-9 H Metobromuron** C9H11BrN2O2 259,1 003060-89-7 H Metolachlor C15H22CINO2 283,8 051218-45-2 A Metoxuron** C10H13CIN2O2 228,7 19937-59-8 H Monolinuron C9H11CIN2O2 214,6 1746-81-2 H Sebutylazine** C9H15CIN5 228,7 00728-69-3 T Simazine C7H12CIN5 201,7 000122-34-9 T Terbutylazine C9H16CIN5 229,7 005915-41-3 T 1) CAS No.: Chemical abstracts number 2) Substance family: T: Triazine; H: Phenylurea herbicide; A: substituted anilide *: Main degradation product of atrazine **: Not included in the performance data