Page:NIOSH Manual of Analytical Methods - 9201.pdf/8

 CHLORINATED AND ORGANONITROGEN HERBICIDES (PATCH): METHOD 9201, Issue 1, dated 15 January 1998 - Page 8 of 11 (1)

TABLE 4. APPROXIMATE RETENTION TIMES OF SELECTED CHLORINATECOMPOUNDS Compound (by retention time on Capillary Column: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

DB-1

CDAA

DB-5

DB-WAX

14.37

(2)

2,4-D, ME Dicamba, ME(2) 2,4-D, IPE(3) Simazine Atrazine Propazine 2,4-DB, ME(2) Metribuzin Dimethenamid Acetochlor Alachlor Cyanazine Metolachlor Pendimethalin 2,4-D, BE(4) 2,4-D, EH(5)

Retention Times in Minutes (Capillary Column by Approximate Increase in Polarity) DB-5ms DB-17 DB-1701 DB-210 DB-225

12.90 12.96

13.89

14.37 14.97 15.11 17.01 17.70

16.72 19.20 19.42 19.50 19.61 21.10 21.13 21.18 21.44 22.23 22.26 22.98 23.73 24.38

10.13

10.25

12.25

12.02 12.18

12.91 12.59

16.52 16.34

7.59 7.79

16.90 15.93

18.62 17.17

9.72

22.01

23.08

19.78 27.07 22.17

12.95 19.67 14.85

17.45 30.00 19.43

14.95 36.00 15.96

26.25 26.71

16.79 17.17

25.86 23.49

20.50 18.55

14.03 17.51

15.24 17.17 16.96 21.46 22.73

14.66 15.19 19.99 16.67 18.67 20.60 20.12

(1) Actual retention times will vary with individual columns and chromatographic conditions. Column conditions are give in Table 2. Data is from Backup Data Report [1]. (2) ME = Methyl ester. Methyl ester formed by reaction of the free acid form with diazomethane. (3) IPE = Isopropyl ester. (4) BE = 2-Butoxyethyl ester. (5) EH = 2-Ethylhexyl ester. NIOSH Manual of Analytical Methods (NMAM), Fourth Edition