CHLORINATED AND ORGANONITROGEN HERBICIDES (AIR SAMPLING): METHOD 5602, Issue 1, dated 15 January 1998 - Page 7 of 14
TABLE 2. USEFUL GAS CHROMATOGRAPHIC COLUMNS AND CONDITIONS (1) Parameter
Conditions
Column Parameters: (2)
Stationary phase
(3)
DB-17
(4)
DB-1701
(4)
DB-210
(4)
DB-1
DB-5
DB-5ms
DB-225
DB-WAX
Length (meters)
30
30
30
30
30
30
30
30
I.D. (millimeters)
0.25
0.32
0.32
0.25
0.53
0.32
0.32
0.32
Film thickness (µm)
0.25
0.50
1.00
0.25
1.00
0.25
0.25
0.50
Initial temperature (oC)
120
50
90
90
90
140
140
160
0
1
1
1
0.5
0
0
0
5
10
3
5
5
Oven Temperatures:
Initial temperature hold time (min.) o
35
35
15
First intermediate temperature (oC)
First temperature ramp ( C/min.)
160
160
180
Second temperature ramp (oC/min.)
5
5
2
200
200
210
o
Second intermediate temperature ( C) o
Third temperature ramp ( C/min.) Final temperature (oC) Final temperature hold time (min.)
3
3
10
250
290
230
230
235
215
220
250
4
5
9
9
10
5
15
20
Helium
Helium
Helium
Helium
Helium
Helium
Helium
Helium
Mobile Phase and Injection conditions: Carrier Gas Head pressure (p.s.i.)
10
10
12
12
3.5
10
10
10
Injection volume (µL)
2-4
2-4
2-4
2-4
2
2-4
2-4
2-4
splitless
splitless
splitless
splitless
splitless
splitless
splitless
splitless
Injection mode
(1)
Actual column and conditions may vary depending on analyte, interferences, and analytical objectives. The conditions given above correspond to Table 4.
(2)
Other types of fused silica capillary columns may also work well.
(3)
Column and conditions used for method evaluation. Good column for separation of atrazine and simazine.
(4)
Useful columns for separating cyanazine from other listed analytes.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
