Site Preparation
Carrier and Reagent Gas Requirements
Table 6 lists the specifications for the carrier and reagent gases. Pressures and flows are as measured at the bulkhead fittings on the back of the instrument, not at the gas supply. We recommend that additional
Table 6 | Carrier and reagent gas requirements |
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| Purity | Typical pressure range, | Typical flow, mL/min |
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| kPa (psi) |
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Helium (required) | 99.9995% or better and | 345 to 550 (50 to 80) | 20 to 50 (column and split flow) | |
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Methane reagent gas | Research or SFC grade, | 103 to 172 (15 to 25) | 1 to 2 | |
(required for CI operation) | 99.999% |
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Isobutane reagent gas | Instrument grade, | 103 to 172 (15 to 25) | 1 to 2 | |
(optional) |
| 99.99% |
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Ammonia reagent gas | Research or SFC grade, | 34 to 55 (5 to 8) | 1 to 2 | |
(optional) |
| 99.9995% |
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Carbon dioxide reagent gas | SFC Grade, | 103 to 138 (15 to 20) | 1 to 2 | |
(optional) |
| 99.995% |
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WA R N I N G | Methane is flammable and ammonia is corrosive and toxic. Read and follow the | |
safety information that comes with the gases. | ||
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Site Preparation Guide | 31 |
