User's Guide

Etape 2 : Prélever un échantillon d’air Page 11/21
User guide of the Analysis kit for Trichloramine on the air
VI. Step 2 : Capturing trichloramine in the air
1) Exposure time
The measurement scale will depend on the exposure time.
It takes a minimum exposure time of 1h30.
Scale of measurement according to the exposure time :
- Exposure time <2h: 0.3 ~ 5mg/m
3
(WARNING: on a short exposure time the
measurement will be very sensitive to pollution during handling).
o Case 1 : trichloramine <0.3mg/m
3
: the trikloram will indicate that the value is
<0.3mg/m
3
and will not be able to display the exact value.
o Case 2 : 0.3 <trichloramine <5mg/m
3
: trikloram will indicate the value at ±0.1mg/m3
- Exposure time > or = to 2h: 0 ~ 2mg/m
3
o Case 1 : 0 <trichloramine <2mg/m
3
: trikloramate will indicate the value at ±0.1mg/m
3
o Case 2 : trichloramine> 2mg/m
3
: trikloramate will indicate that the value is> 2mg/m
3
and will not be able to display the exact value
2) Necessary equipment
Id Designation
2 Sampling device
4 Filter clamp
6 Sampling sample
3) Method
N° Action Picture
1
Clean the filter clamp [4] by pouring
demineralized water over it.
2
Unclip the hood of the sampler [2] by turning
counter-clockwise
The determination of the trichloramine concentration may vary due to
external pollution during handling (examples: postilion, finger on
sampling sample, filter clamps, vat analysis, syringe not or poorly
washed before analysis ...)
The influence of external pollution reduces with the increase of the
duration of exposure
.