Page:NIOSH Manual of Analytical Methods - 5602.pdf/9

 CHLORINATED AND ORGANONITROGEN HERBICIDES (AIR SAMPLING): METHOD 5602, Issue 1, dated 15 January 1998 - Page 9 of 14

TABLE 4. APPROXIMATE RETENTION TIMES OF SELECTED CHLORINATED ORGANONITROGEN AND CARBOXYLIC ACID COMPOUNDS(1) Compound (by retention time on DB5) Capillary Column:

Retention Times in Minutes (Capillary Column by Approximate Increase in Polarity) DB-1

DB-5

1

CDAA

2

2,4-D, ME(2)

3

(2)

16.72

2,4-D, iPE(3)

19.20

5

Dicamba, ME

DB-5ms

DB-17

DB-1701

10.13

10.25

12.25

DB-210

DB-225

DB-WAX

14.37

Simazine

12.90

19.42

12.02

12.91

16.52

7.59

16.90

18.62

6

Atrazine

12.96

19.50

12.18

12.59

16.34

7.79

15.93

17.17

7

Propazine

8

2,4-DB, ME(2)

9

Metribuzin

9.72

22.01

23.08

10

Dimethenamid

11

Acetochlor

12

Alachlor

14.37

21.44

15.24

15.19

19.78

12.95

17.45

14.95

13

Cyanazine

14.97

22.23

17.17

19.99

27.07

19.67

30.00

36.00

14

Metolachlor

15.11

22.26

16.96

16.67

22.17

14.85

19.43

15.96

15

Pendimethalin

16

2,4-D, BE

(4)

17.01

23.73

21.46

20.60

26.25

16.79

25.86

20.50

17

2,4-D, EH

(5)

17.70

24.38

22.73

20.12

26.71

17.17

23.49

18.55

19.61 14.03 13.89

21.10

17.51

21.13 21.18

14.66

22.98

18.67

(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