Benzene (C6H6) Detector Tubes | Standard Range: 0.5-10ppm | N10-101-01 | PreTube

NAGCO Benzene Specific C₆H₆ detector tubes are designed for the measurement of benzene concentrations using NAGCO pumps and tubes. A pretreatment layer removes interferences, providing selective detection of benzene across a broad concentration range.

Specifications:

• Standard Range: 0.5–10 ppmv
• Extended Range: 0.25–5 ppmv
• Extended Range: 1.5–30 ppmv
• Pump Strokes: 6 / 3 / 1
• Sample Volume: 600 / 300 / 100 mL
• Sample Time: 6 × 3 / 3 × 3 / 3 minutes
• Correction Factor: 0.27 / 1 / 4
• Precision (Relative Standard Deviation): ≤±12%
• Humidity: No effect, 0–95% RH
• Temperature Range: 0–40°C (32–104°F)
• Temperature Correction Factors: 2.7 at 0°C, 1.6 at 10°C, 1.0 at 25°C, and 0.6 at 40°C
• Storage Life: 1 year in darkness at 5–25°C (40–77°F); refrigeration preferred
• Color Change: White → Brown

Reaction Principle:
The pretreatment tube removes potential interferences before the benzene measurement. Benzene reacts through a two-step process involving formaldehyde and sulfuric acid, producing p-quinoid products that create the measurable color change.

Cross-Sensitivity:
The tube is designed to minimize interference from common gases and hydrocarbons. Testing showed no apparent response from isobutylene, n-heptane, toluene, methane, carbon monoxide, or hydrogen sulfide at the concentrations listed on the datasheet. n-Hexane at concentrations above 100 ppm may reduce the benzene response. m-Xylene produced a measurable response of 5 ppm at a test concentration of 100 ppm.

Other Possible Interferences:
Hydrocarbons and similar reducing gases may interfere with measurement.

Datasheet