Transcript TPH 418.1 - Harlem Children Society

TPH METHOD
418.1
Michaelle Exhume
Environmental Testing Laboratories, Inc.
Mentor: Patty Els
Freeport High School
VOCABULARY
• EPA - Environmental Protection Agencies
• Solvent – a substance that is capable of
dissolving another substance
• Freon – nonflammable gaseous liquid
• Hexane – a colorless flammable liquid used as a
solvent and as a working fluid in low
temperature thermometers.
• Silica Gel- a porous form of silica that is highly
absorbent
• MS- Matrix Spike
• MSD- Matrix Spike Duplicate
…CONTINUED
• Spectrophotometer – an instrument used for
measuring the intensity of light of a definite
wavelength transmitted by a substance or a
solution, thus providing a measure of the
amount of material in the solution absorbing
the light.
• VOA
Introduction
• What is TPH 418.1?
It is defined as the measurable amount of petroleum-based
hydrocarbons in an environmental media. Since it is a measured,
gross quantity without identification of its elements, the TPH value
still represents a mixture. Therefore, TPH itself is not a direct risk to
humans and the environment
• Most of the samples used are collected soils and groundwater from
construction sites
• This method is used to find the percentage of petroleum
hydrocarbons
• This test is important because it is required by the EPA periodically
every year.
OBJECTIVE
• To find the percentage of petroleum
hydrocarbons in the given samples.
Materials
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VOA
Sonicator
Soil Samples
Silica Gel
Digital Weighing Scale
Spatula
Freon
Spectrophotometer
Pipette
Cuvette
Glass Wool
Florossil
Procedure
TPH 418.1
1.
2.
3.
4.
Weigh approximately 10 grams of soil sample into a
VOA
*Blank 10 grams of sand
*MS
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*MSD
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Add 3 grams of silica gel to each VOA.
Add 20 ml of Freon
Spike the MS, and MSD with .2 ml of 10,000 ppm TPH
spike solution
…CONTINUED
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Sonicate for 20 minutes
Let it cool and settle for
about 15 minutes
Filter the sample through a
glass pipette with Florossil
and glass wool
Place the filtered sample in
spectrophotometer
Calculate the results using
the following formula:
conc Ug/mL *vol ml/wt (gm)
= final conc PPM
RESULTS
COC
VOL
0506408-3
20
0506408-4
20
0506408-5
20
0506408-5DUP 20
0506408-6
20
0506408-7
20
0506414-1
20
0506414-2
20
0506414-3
20
0506492-1
20
0506492-2
20
0506492-3
20
WEIGHT
10.48
10.17
10.09
10.09
10.19
10.32
10.69
10.63
10.26
10.62
10.62
10.55
ABS
.034
-.007
.01
.009
.037
-.005
.722
.789
.639
-.004
.012
.207
TS
.895
.986
.944
.944
.886
.527
.833
.829
.848
.895
.748
.893
Ug/mL
28.89
3.12
13.80
13.17
30.78
4.37
461.42
503.54
409.24
5.00
15.06
137.65
…continued
COC
0507078-2
0507080-2
0507087-1
0507087-2
BLANK
BLANK MS
BLANK MSD
VOL
20
20
20
20
20
20
20
WEIGHT
10.62
10.20
10.07
10.04
10.55
10.84
10.82
ABS
1.036
.556
.136
.007
0
.208
.217
TS
.898
.911
.822
.906
1
1
1
Ug/mL
658.83
357.06
93.02
636.20
7.52
144.57
143.94
CONCLUSION
This project illustrates that the TPH
method 418.1 can be used to find out the
percentage of hydrocarbons in a highly
contaminated soil sample.
FUTURE WORK
• Since Freon and hexane are extraction
solvents that evaporate quickly, new
methods will be examined to try to find an
easier and cheaper way to decontaminate
a large portion of highly contaminated
soil.
REFERENCES
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www.dictionary.reference.com/freon
www.dictionary.reference.com/hexane
www.dictionary.reference.com/solvent
www.phaseonline.com
The Great Big Book of Chemistry
SOP methods
TPH method 418.1 book
ACKNOWLEDGEMENTS
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Dr. Sat Bhattacharya
Harlem Children Society
Mr. Edward Irwin
Patty Els
Robin Knappe
Suni Varghese
Lisa Maurino
Thank you