Agilent Technologies ALS Handbuch Seite 39

Table 17
Table 17 5977 Series MSD total gas flow limitations
Feature
High vacuum pump
1
Optimal gas flow mL/min
Maximum recommended gas flow,
mL/min
Maximum gas flow, mL/min
Max column id
1 Total gas flow into the MSD = column flow + reagent gas flow (if applicable) + Agilent CFT device flow (if applicable). Instru-
ments using a JetClean ion source system may also add a small (~0.075 mL/min) hydrogen flow.
2 Expect degradation of spectral performance and sensitivity.
Table 18
source pressures.
Table 18
Carrier and reagent gas requirements
Helium (required)
(column and split flow)
Hydrogen (optional)
(column and split flow)
Methane reagent gas
(required for CI operation)
Isobutane reagent gas (optional)
Ammonia reagent gas (optional)
Carbon dioxide reagent gas (optional)
1 Hydrogen gas can be used for the carrier gas but specifications are based on helium as the carrier
GC, GC/MS, and ALS Site Preparation Guide
lists the limits on total gas flow into the 5977 Series MSD.
5977A MSD
5977B MSD
2
lists typical flows resulting from selected carrier and reagent gas
5977 and 5975 Series MSD carrier and reagent gases
1
gas. Please observe all hydrogen gas safety cautions.
G7037A G7038A, G7039A, G7040A
G7080B G7081B, G7077B, G7078B, G7079B
Diffusion Performance turbo
1.0 1.0 to 2.0
1.5 4.0
2.0 6.5
0.25 mm (30 m) 0.53 mm (30 m)
Typical pressure range
345 to 552 kPa
(50 to 80 psi)
345 to 552 kPa
(50 to 80 psi)
103 to 172 kPa
(15 to 25 psi)
103 to 172 kPa
(15 to 25 psi)
34 to 55 kPa
(5 to 8 psi)
103 to 138 kPa
(15 to 20 psi)
7890 Series GC Site Preparation
Typical flow (mL/min)
20 to 50
20 to 50
1 to 2
1 to 2
1 to 2
1 to 2
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