Agilent 255 Nitrogen Chemiluminescence Detector
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The Agilent 255 Nitrogen Chemiluminescence Detector (NCD) is a nitrogen-specific detector that produces a linear and equimolar response to nitrogen compounds based on a chemiluminescent reaction of NO with ozone. Even complex sample matrices can be analyzed with little or no interference. It can be used in a gas chromatograph system (GC).
Specifications
| Type | Specifications |
|---|---|
| Sensitivity | <3 pg N/second (signal to noise 3:1) in both N and nitrosamine modes |
| Selectivity | g N/g C > 2 to 107 in N mode (selectivity in nitrosamine mode is matrix-dependent) |
| Linearity | 104 |
| Repeatability | <1.5% RSD 8 hours (~ the same in N and nitrosamine)<2% RSD 18 hours (~3% RSD in nitrosamine mode over 21 hours) * Burner temperature 950 °C, 11 SCCM oxygen, and 6 SCCM hydrogen; 25 ppm N as nitrobenzene in toluene; 0.2 μL injection on column (HP 19095-121Z), n=7 for 3 hours; n=13 for 18 hours and n=10 n-dipropylnitrosamine in toluene at 4 μg/mL, 0.2 μL injection on column (HP 19095-121Z). |
| Gas flow through Ozone Generator | 20-30 mL/min at 3-6 psig (inlet pressure) |
| Typical reaction cell pressure | 4 – 8 Torr RV5 Oil Sealed Pump 6 – 12 Torr Dry Piston Pump |
| Typical Burner Pressure | 130 – 150 torr operating |
| Typical Burner Temperature | 900 °C |
| Typical Hydrogen Flow Rate | 6-10 SCCM |
| Typical Oxygen Flow Rate | 8 – 15 SCCM |
| Signal Output Ranges | 0-1V 0-10V |
| Dimensions (H x W x D) | 16 x 9.2 x 21.8 in |
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