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• 12 • 800-356-1688 • 2004 vol. 3
New Reference Materials
for Environmental Analyses
Drinking Water Odor Standard
•New reference mix of the two most common odor-causing compounds.
•Convenient concentration for purge and trap analysis: 100µg/mL in methanol.
by Katia May, Ph.D., Senior R&D Chemist
US EPA Method 8270 Mixes in 100%Methylene Chloride
•Better peak shape for early eluting semivolatiles, compared to methylene
chloride/benzene solvent.
•Methanol-free methylene chloride enhances stability.
•Calibration mix and matrix spike mix.
US EPA Method 524 Surrogates Standard
•Separate mixes for surrogates and internal standard.
• Fortification solution combines surrogates and internal standard.
•Calibration mixes and all other quality control mixes also available.
acenaphthene
acenaphthylene
aniline
anthracene
azobenzene1
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.
8270 MegaMix™ (76 components)
11,2-diphenylhydrazine (8270-listed analyte) decomposes to
azobenzene (mix component).
2N-nitrosodiphenylamine (8270-listed analyte) decomposes to
diphenylamine (mix component).
Each 5-pk. 10-pk.
1,000µg/mL each in methylene chloride, 1mL/ampul*
31850 $108.20 31850-510 $486.90 —
w/data pack
31850-500 $118.20 31850-520 $541 31950 $973.80
Most complex mixes for US EPA Method 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 in methylene 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 unique method of preparing our Method
8270 MegaMix™ calibration mix (cat.# 31850)
allows us to exclude benzene as a solvent.
Methylene chloride alone is an effective solvent
for these analytes; methanol-free methylene
chloride enhances the stability of the product.
Our new 8270 MegaMix™ in methylene chloride
is a direct replacement for the older mix, but
allows better chromatography.
Similarly, we offer new 8270 Matrix Spike Mix
(cat.# 31851), 8270 Benzidines Mix (cat.#
31852), and 1,4-Dioxane (cat.# 31853) in 100%
methylene chloride. Equivalents of these three
mixes are available in methanol/methylene chlo-
ride/benzene (cat.# 31687) or methanol (cat.#
31688, cat.# 30287), respectively.
*3-methylphenol and 4-methylphenol at 100µg/mL.
8270 Matrix Spike Mix (76 components)
Each 5-pk. 10-pk.
200µg/mL each in methylene 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 8270 MegaMix™, but at lower concentration for
spiking.
1-bromo-4-fluorobenzene 1,2-dichlorobenzene-d4
524.2 Surrogate Standard
Each 5-pk. 10-pk.
2,000µg/mL each in P&T methanol, 1mL/ampul
30607 $23 30607-510 $103.50 —
w/data pack
30607-500 $33 30607-520 $115 30707 $207
US EPA Method 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 new mix to monitor
method performance by combining it with the
sample before extraction. Together with
Drinking Water VOA MegaMix™ 524.2 Rev. 4.2
calibration mix (cat.# 30601, see page 11),
Ketones Mix 524.2 Rev. 4.2 (cat.# 30602, see
page 11), and additional calibration and quality
control mixes listed in our catalog, the new mix
completes our set of reference materials for
Method 524.
Unpleasant odor in drinking water 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 surface water, 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 help monitor the quali-
ty of drinking water, Restek's researchers have
developed this convenient new reference mix.
(+/-)-geosmin 2-methylisoborneol
DrinkingWater Odor Standard
Each 5-pk.
100µg/mL each in P&T methanol, 1mL/ampul
30608 $52 30608-510 $234
Searching for the Perfect Solution?
Let Restek create the perfect reference mixture—to your exact specifications. Contact the Technical Service Team, or your
Restek representative, or visit us online at
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benzidine
3,3'-dichlorobenzidine
3,3'-dimethylbenzidine
8270 Benzidines Mix
Each 5-pk. 10-pk.
2,000µg/mL in methylene 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 in methylene chloride, 1mL/ampul
31853 $22 31853-510 $99 —
w/data pack
31853-500 $32 31853-520 $110 31953 $198