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New Reference Mix of Canadian Drinking Water Volatiles
By JasonThomas, Environmental Innovations Chemist
• New, complete mi x includes 19 vol atiles on Canadian Drinking Water List.
• Simple purg e and trap GC/MS analysis.
• Rtx®-VMS column provides sharp peaks for early eluters, resolves heavie r compounds.
Much like the US Environmental Protection
Agency's regulatio n of environmental contami
nants in drinking water through the Safe Drinking
Water Act, Canada has its own stipulations regard
ing drinking water. These mandates are laid out in
the
Guidelines for Canadian Drinking Water
Quality
published by Health Canada's Water
Quality and Health Bureau . Regulation falls under
the jurisdiction of the individual provinces and
territories, which use these guidelines to establish
water quality requirements for municipal water
sources.'
Here, we illustrate the analysis of the volatiles por
tion of the Canadian contaminants list, now avail
able from Restek as Canadian Drinking Water
Volatiles Mix (cat.# 30610). We analyzed a 25mL
water sample containing 50ppb each analyte, using
an
or
Analytical 4660 purge and trap system, with
autosampler, and an HP
5890/5971 GC/MS
sys
tem. A 30m x 0.25mm ID x
1AIlm
Rtx®-VMS col
umn (cat.# 19915), in conjunction with a Siltek®
deactivated 1mm ID split inlet liner and a 35:1
split, affords good peak shape for th e early-eluting
components, as well as good resolutio n for the
heavier compounds. The Rtx®-VMS column is an
excellent choice for many other volatiles applica
tion s as well.
Reference
lhttp://www.hc-sc.gc.ca/ewh-semt/water-eau/drink-potab/index_e.htmlRtx'"-VMSColumn (fused silica)
(proprietary
Crossbond?
phase)
10
df
(um)
temp. limits
length cat.
#
0.2Smm lAO -40 to
2401260°C
30-Meter 1991S
Canadian Drinking Water Volatiles Mix
new!
(19
components)
benzene
l,l-dichloroethylene
bromodichloromethane
ethylbenzene
bromoform
methylene chloride
carbon tetrachloride
tetrachloroethylene
chlorobenzene
toluene
chloroform
trichloroethylene
dibromochloromethane
m-xylene
1,2-dichlorobenzene
o-xylene
1,4-dichlorobenzene
p-xylene
1,2-dichloroethane
2,000Ilg/mLeach in P&Tmethanol, ImL/ampul
cat.
#
30610
@ L-
_
2006 vol. 1
Figure 1
Canadian Drink ing Water Volatiles Mix analyzed
on an Rtx®-VMS column.
1. 1,1-dichloroethene
2. methylene chloride
3. chloroform
18
4. carbon tetrachloride
5. benzene
!9
4.00 5.00 6.00
7.00
8.00
9.00 10.00 11.00 12.00 13.00 14.0 15.00 16.00 17.00 18.00 19.0
min.
6. 1,2-dichloroethane
16
7. trichloroethylene
14,15
8. bromodichloromethane
13
9. toluene
10. tetrachloroethylene
11. dibromochloromethane
12. chlorobenzene
12
13. ethylbenzene
14. m-xylene
15.p-xylene
9
16. o-xylene
17. bromoform
10
18. 1,4-dichlorobenzene
19. 1,2-dichlorobenzene
17
11
5
7
1
~
~~
8
2
6
~
~
I
~
GC_EV00813
Column:
Rtx$-VMS 30m, 0.25mm!D,
1.4f.lm(cat.# 19915)
Sample:
50
ppb
each analytein 25mLwater, prepared fromCanadianDrinkingWater
Volatiles Mix(cat.# 30610),
2000f.lg/mLeachcomponent inpurge & trap methanol
Inj.:
split, 35:1,Imm!DSllteke-treatedsplit inlet liner (cat.# 20972-214.1)
Inj. temp.:
200°C
Carrier gas:
helium
Linear velocity:
30cm/sec.
@
35°C, constant pressure
Oven temp.:
35°C(5min.), to 70°C
@
5°C/min., to 220°C
@
20°C/min. (hold3 min.)
Del.:
MS
Transfer line
ternp.:
150°C
Scan range:
35-250amu
Ionization:
EI
Mode:
scan
Purge and Trap Conditions
Instrument:
OJ
4660 Eclipse Purge
&
Trap
Trap:
#10 (Tenax
3
/sllicagel/
carbon molecular sieve)
Sample temp.:
40°C
Purge:
11
min.
@
40mL/min.
Desorb preheat:
185°C
Desorb:
0.5min.
@
190°C
Desorbflowrate: 35.0mL/min.
Bake:
6 min.
@
210°C
Interface:
split injector
Transfer linetemp.: 150°C
Website :
www.chromtech.net.auE-mail :
info@chromatech.net.auTelNo : 03 9762 2034 . . . in AUSTRALIA