• 12 •
800-356-1688 •
2004vol. 3
NewReferenceMaterials
forEnvironmentalAnalyses
DrinkingWaterOdorStandard
•New referencemix of the twomost common odor-causing compounds.
•Convenient concentration for purge and trap analysis: 100µg/mL inmethanol.
by KatiaMay, Ph.D., Senior R&DChemist
USEPAMethod8270Mixes in100%MethyleneChloride
•Better peak shape for early eluting semivolatiles, compared tomethylene
chloride/benzene solvent.
•Methanol-freemethylene chloride enhances stability.
•Calibrationmix andmatrix spikemix.
USEPAMethod524SurrogatesStandard
•Separatemixes for surrogates and internal standard.
•Fortification solution combines surrogates and internal standard.
•Calibrationmixes and all other quality control mixes also available.
acenaphthene
acenaphthylene
aniline
anthracene
azobenzene
1
benzo(a)anthracene
benzo(a)pyrene
benzo(b)fluoranthene
benzo(ghi)perylene
benzo(k)fluoranthene
benzyl alcohol
benzyl butyl phthalate
bis 2-ethylhexyl adipate
bis(2-chloroethoxy)methane
bis(2-chloroethyl)ether
bis(2-chloroisopropyl)ether
bis(2-ethylhexyl)phthalate
4-bromophenyl phenyl ether
carbazole
4-chloroaniline
4-chloro-3-methylphenol
2-chloronaphthalene
2-chlorophenol
4-chlorophenyl phenyl ether
chrysene
dibenzo(a,h)anthracene
dibenzofuran
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
2,4-dichlorophenol
diethyl phthalate
dimethyl phthalate
2,4-dimethylphenol
1,2-dinitrobenzene
1,3-dinitrobenzene
1,4-dinitrobenzene
4,6-dinitro-2-methylphenol
2,4-dinitrophenol
2,4-dinitrotoluene
2,6-dinitrotoluene
di-
n
-butyl phthalate
di-
n
-octyl phthalate
diphenylamine
2
fluorene
fluoranthene
hexachlorobenzene
hexachlorobutadiene
hexachlorocyclopentadiene
hexachloroethane
indeno(1,2,3-cd)pyrene
isophorone
1-methylnaphthalene
2-methylnaphthalene
2-methylphenol
3-methylphenol*
4-methylphenol*
naphthalene
2-nitroaniline
3-nitroaniline
4-nitroaniline
nitrobenzene
2-nitrophenol
4-nitrophenol
N-nitrosodimethylamine
N-nitroso-di-
n
-propylamine
pentachlorophenol
phenanthrene
phenol
pyrene
pyridine
2,3,4,6-tetrachlorophenol
2,3,5,6-tetrachlorophenol
1,2,4-trichlorobenzene
2,4,5-trichlorophenol
2,4,6-trichlorophenol
*3-methylphenol and 4-methylphenol at 500µg/mL.
8270MegaMix
™
(76 components)
1
1,2-diphenylhydrazine (8270-listed analyte) decomposes to
azobenzene (mix component).
2
N-nitrosodiphenylamine (8270-listed analyte) decomposes to
diphenylamine (mix component).
Each
5-pk.
10-pk.
1,000µg/mL each inmethylene chloride, 1mL/ampul*
31850
$108.20
31850-510
$486.90
—
w/data pack
31850-500
$118.20
31850-520
$541
31950
$973.80
Most complexmixes for US EPAMethod 8270
are prepared in combinations of methylene chlo-
ride/benzene solvent.The primary reason for
using benzene, a high boiling solvent, is the
belief that polyaromatic hydrocarbons are not
readily soluble inmethylene chloride. Benzene,
however, can contribute to poor peak shape and
low responses for early eluting compounds such
as pyridine, N-nitrosomethylamine, N-nitro-
somethylethylamine, 1,4-dioxane, and 2-picoline.
Restek chemists have studied the solubility of
polyaromatic hydrocarbons and determined that
our uniquemethod of preparing ourMethod
8270MegaMix
™
calibrationmix (cat.# 31850)
allows us to exclude benzene as a solvent.
Methylene chloride alone is an effective solvent
for these analytes; methanol-freemethylene
chloride enhances the stability of the product.
Our new 8270MegaMix
™
inmethylene chloride
is a direct replacement for the oldermix, but
allows better chromatography.
Similarly, we offer new 8270Matrix SpikeMix
(cat.# 31851), 8270 BenzidinesMix (cat.#
31852), and 1,4-Dioxane (cat.# 31853) in 100%
methylene chloride. Equivalents of these three
mixes are available inmethanol/methylene chlo-
ride/benzene (cat.# 31687) ormethanol (cat.#
31688, cat.# 30287), respectively.
*3-methylphenol and 4-methylphenol at 100µg/mL.
8270MatrixSpikeMix
(76 components)
Each
5-pk.
10-pk.
200µg/mL each inmethylene chloride, 5mL/ampul*
31851
$154.50
31851-510
$695.25
—
w/data pack
31851-500
$164.50
31851-520
$772.50
31951
$1390.50
Same components as 8270MegaMix
™
, but at lower concentration for
spiking.
1-bromo-4-fluorobenzene
1,2-dichlorobenzene-d4
524.2SurrogateStandard
Each
5-pk.
10-pk.
2,000µg/mL each in P&Tmethanol, 1mL/ampul
30607
$23
30607-510
$103.50
—
w/data pack
30607-500
$33
30607-520
$115
30707
$207
US EPAMethod 524 requires a surrogates stan-
dard, an internal standard, and the surrogates
and internal standard combined in a fortification
solution.We have offered the fortification solu-
tion (cat.# 30201) and the internal standard
(cat.# 30030); we now offer the surrogates
mix, described here. Use the newmix tomonitor
method performance by combining it with the
sample before extraction.Together with
DrinkingWater VOAMegaMix
™
524.2 Rev. 4.2
calibrationmix (cat.# 30601, see page 11),
KetonesMix 524.2 Rev. 4.2 (cat.# 30602, see
page 11), and additional calibration and quality
control mixes listed in our catalog, the newmix
completes our set of referencematerials for
Method 524.
Unpleasant odor in drinkingwater is associated
with the growth and decay of microorganisms.
Blue-green algae, green algae, diatoms, and
flagellates are the four groups responsible for
most common odor problems. Geosmin, pro-
duced by blue-green algae, has an earthy, musty
smell. Actimycetes, mold-like bacteria also pres-
ent in surfacewater, produce another common
odor compound: 2-methylisoborneol.
The threshold value for these compounds is low
(10ppt) and purge and trap analyses usually are
used to quantify them.To helpmonitor the quali-
ty of drinkingwater, Restek's researchers have
developed this convenient new referencemix.
(+/-)-geosmin
2-methylisoborneol
DrinkingWaterOdorStandard
Each
5-pk.
100µg/mL each in P&Tmethanol, 1mL/ampul
30608
$52
30608-510
$234
Searching for thePerfectSolution?
Let Restek create theperfect referencemixture—to your exact specifications. Contact theTechnical ServiceTeam, or your
Restek representative, or visit us onlineat
!
new
★
!
new
★
!
new
★
benzidine
3,3'-dichlorobenzidine
3,3'-dimethylbenzidine
8270BenzidinesMix
Each
5-pk.
10-pk.
2,000µg/mL inmethylene chloride, 1mL/ampul
31852
$28
31852-510
$126
—
w/data pack
31852-500
$38
31852-520
$140
31952
$252
1,4-Dioxane
Each
5-pk.
10-pk.
2,000µg/mL inmethylene chloride, 1mL/ampul
31853
$22
31853-510
$99
—
w/data pack
31853-500
$32
31853-520
$110
31953
$198
