38 
BSH Report No. 56 
A look at the hardware 
GC-FID- 
BSH 
IAEA 
NFI 
RWS 
Conditions 
Hardware and Operation 
Instrument 
Agilent 7890A 
Agilent 7890A 
Agilent 6890N 
Agilent 7890A 
Detector 
FID 
FID 
FID 
FID 
Carrier gas 
He, H2, other 
H2 
He 
N2 
He 
Injection 
Volume [pL] 
1 
1 
1 
1 
Injection temp. [°C] 
320 
300 
300 
325 
Pre-lnject. delay [sec] 
1 
0 
0 
5 
Injector type 
solvent vent* 
spiltless 
split, 20:1 
splitless 
Column 
Name 
J&W DB-5 
HP-5 
HP Ultra-1 
J&W DB-1 
Length [m] 
10 
30 
25 
15 
Diameter [mm] 
0.1 
0.25 
0.2 
0.25 
Film [pm] 
0.1 
0.25 
0.33 
0.25 
Const, flow [mL/min] 
0.92 
1.2 
0.4 
1.1 
Oven program 
Start [°C] 
40 
60 
60 
35 
Hold_start [min] 
0.71 
1 
1 
1.5 
Rate_l [°C/min] 
30.2 
6 
30 
10 
Rate_l_end [°C] 
300 
310 
150 
325 
Hold_l [min] 
2.5 
- 
0 
- 
Rate_2 [°C/min] 
15 
- 
5 
- 
End [°C] 
325 
310 
320 
325 
Hold_end [min] 
3.6 
15 
12 
10 
Run time [min] 
17.0 
57.7 
16.0 
40.5 
FID-Conditions 
Heater [°C] 
340 
300 
250 
375 
H2 [mL/min] 
30 
35 
30 
40 
Air [mL/min] 
320 
350 
320 
300 
Makeup [mL/min] 
30 
28.09 
30 
25 
*= The "Solvent Vent Mode" is a setting unique to PTV-injectors. It is a special type of splittless injection but allows the handling of large 
volumes when needed. 
As can be seen from the table above, GC-FID conditions vary a lot between 
the participants. Carrier gas, column type and separation conditions can there 
for contribute to the systematic differences observed.