International Journal of Analytical Chemistry / 2014 / Article / Tab 2

Research Article

Trace Analysis in End-Exhaled Air Using Direct Solvent Extraction in Gas Sampling Tubes: Tetrachloroethene in Workers as an Example

Table 2

Method precision and accuracy expressed as relative standard deviation and mean recovery, respectively; determined using 10 individual samples in each case.

Concentration levels (µg/L)Precision RSD ( ) (%)Mean recoveries ( ) (%)

44.883.9
156.982.7