BS EN ISO 11369:1997

This standard BS EN ISO 11369:1997 Water quality. Determination of selected plant treatment agents. Method using high performance liquid chromatography with UV detection after solid-liquid extraction is classified in these ICS categories:

• 13.060.50 Examination of water for chemical substances

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 0,1 µg/l. Limited additional data indicate that it can be extended to 0,05 µg/l (see table 1 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 table 1 has been made according to the knowledge at the time of the interlaboratory trial (1992). Data for some other substances are given in annex A.

Table 1

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