y = 1.6444x

R² = 0.9921

0

20

40

60

80

100

120

0 20 40 60 80

UVF-3100

Sitelab Corporation

Visit: sitelabcorp.com

USA: 978-363-2299

EPH AROMATIC HYDROCARBONS

Trilogy 255 nm EPH Calibration

Sitelab’s PAH calibration kit is used on the UVF-3100’s EDRO

optics for applications testing EPH Aromatics or “Total PAHs.”

This test matches well to laboratory GC/FID methods for

Extractable Petroleum Hydrocarbons. This test is mostly used

by Sitelab for TPH fingerprinting applications. Trilogy’s higher

readings are due to subtle differences in the emission optics.

PPM

RFU

Curve r2 = 0.997

UVF-3100

RFU

0

35

67

309

544

746

Trilogy

RFU

15

82

140

535

996

1,342

Calibration

Standard

Solvent Blank

0.05 ppm

0.1 ppm

0.5 ppm

1.0 ppm

1.5 ppmUVF-3100 (ppm)

Trilogy (ppm)

PAH

CAL-060

Instead of DRO and GRO, some states

require laboratories to perform EPH and

VPH analysis. These methods separate the

aliphatics and aromatics into fractions. The

aromatics have lower regulatory cleanup

limits. Fluorescence is not sensititive to

aliphatic hydrocarbons.

C9-C18

Aliphatics

C19-C36

Aliphatics

C11-C22

Aromatics

UVF-3100 EPH

Aromatics

7,700

11,000

14,000

3,700

9,300

20,000

4,800

14,000

21,000

5,250

14,400

23,600

0

500

1000

1500

0 0.5 1 1.5 2

TRILOGY ALMOST 2X HIGHER,

BUT RESULTS ARE PROPORTIONATE

MassDEP EPH Results by GC/FID

Concentrations in ppm (mg/KG)FACTORY SITE

GOOD,

ACCURATE

254 LAMP 255 LED

RESPONSE AT 100 PPM EPH EPH

Heat Transfer Fluid 35 55

Heavier Crude Oil 39 64

Lighter Crude Oil 8 14

Old Home Heating Oil 20 40

Motor Oil 9.5 20

Diesel Fuel 3.5 7

Vacuum Pump Oil 2.7 4

Jet Fuel 1.5 3

Gasoline, 93 Octane 0.56 0.88

Gasoline, 87 Octane 0.23 0.34

97

SOIL SAMPLE IN PPM

No. 6 Fuel Oil, Factory Site 60 97

SOILS FROM

NAPL PLUME

Samples shown here not available for Trilogy study.

UVF-TRILOGY

EDRO Module

© SITELAB CORPORATION 2018 TRILOGY EVALUATION STUDY PAGE 6 OF 8