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Table 2 Diffusion tube detection limit, inter-tube variability and blank concentrations

From: Perception of a chronic volcanic hazard: persistent degassing at Masaya volcano, Nicaragua

Gas

Limit of detection (μg)

Inter-tube variability (±μg)

Lab blank concentration (μg)

Travel blank concentration (μg)

SO2

0.030

0.05

0.02

0.04, 0.06

NO2

0.013

0.06

0.02

0.04, 0.04

HCl

0.157

0.05

0.04

0.42, 0.35

HF

0.017

0.01

0.01

0.15, 0.14

HBr

0.068

ND

0.05

0.05, 0.04

  1. These results indicate minimal contamination of the tubes, particularly when compared with the measured values obtained. ND = Not Detected. If travel blanks were high, as with HCl and HF, the lab blank was used to blank correct the data.