The EPA's Tier 3 ruling will reduce the allowed sulfur content in gasoline starting in 2017. Refineries and fuel suppliers will need to test gasoline at ultra-low levels down to 10 mg/kg to comply. The ASTM D7220 method using energy dispersive X-ray fluorescence spectrometry is approved for this testing down to 3 mg/kg. The MESA-7220 analyzer meets the ASTM D7220 method requirements and can help companies meet the Tier 3 standards with immediate results, portability, and cost-effectiveness.

1. © 2015 HORIBA, Ltd. All rights reserved. 1
EDXRF Method for
Ultralow Level Sulfur in Gasoline Analysis to
Comply with US EPA Tier 3 Ruling
As per 40 CFR Part 80 Subpart H – Gasoline Sulfur
HORIBA Sulfur-in-Oil Analyzers
Part I in a Series on EDXRF for Tier 3 ULSG

2. © 2015 HORIBA, Ltd. All rights reserved. 2
Gasoline Supply Chain Responsible for Compliance
Producers .. Refiners .. Blenders .. Suppliers .. Transporters .. Terminals .. Storage
1) ULSG is an acronym for Ultra Low Sulfur in Gasoline.
2) The Tier 3 Ruling reduces allowed sulfur concentrations
in gasoline from an average of 30 mg/kg to an average
of 10 mg/kg beginning in 2017.
3) Refiners, importers and biofuel blenders of gasoline will
be required to perform sulfur analysis at these ultra-low
levels to report compliance throughout the supply
chain.
4) The Ruling also enacted use of a PBMS (Performance
Based Measurement System) approach to allow
reporting laboratories new flexibility regarding the
sulfur test method they may use.
5) Use of a consensus group (e.g. ASTM) standardized test
method (e.g. ASTM D7220) and mandatory quality
control practices validate adequate measurement
quality.
5 Things to Know About the USA EPA Tier 3 Ruling for ULSG

3. © 2015 HORIBA, Ltd. All rights reserved. 3
ASTM D7220 Method Complies with PBMS Requirements
The recently revised ASTM D7220 Sulfur Test Method, initially used for EPA’s
2006 Diesel Ruling which reduced allowed sulfur concentration down to 15PPM,
can also be utilized to meet EPA’s Tier 3 Ruling.

4. © 2015 HORIBA, Ltd. All rights reserved. 4
5 Things to Know About ASTM D7220-12 for Sulfur Testing
1) It is a standard test method for sulfur in automotive, heating &
jet fuels using monochromatic Energy Dispersive X-ray
Fluorescence (EDXRF) Spectrometry.
2) A monochromatic X-ray beam improves EDXRF detection
limits of sulfur by producing a focused energy excitation for
sulfur while reducing interfering signals from the x-ray tube
background as well as other elements in the sample.
3) It has a sulfur determination range of 3-942 mg/kg sulfur with
a Pooled Limit of Quantification (PLOQ) of 3 mg/kg sulfur,
well below the Tier 3 average allowable limit of 10 mg/kg.
4) Its expansive analysis range for sulfur concentration in fuel is
applicable to a variety of fuel types: gasoline, oxygen
enriched gasoline (RFG), diesel, diesel/biodiesel blends
containing up to 50% by volume biodiesel, kerosene, jet fuel,
jet fuel/biodiesel blends containing up to 5% by volume
biodiesel, and #2 home heating oil.
5) An EDXRF Spectrometer that meets ASTM D7220-12’s is
commercially available.

5. © 2015 HORIBA, Ltd. All rights reserved. 5
Results are in Immediately Usable Formats
Large Screen Display:
Easy viewing screen
displays real-time data to
check the measurement
conditions.
Large Printouts:
Printouts show vital
information including
sample ID, X-ray spectrum,
date and time,
measurement average
value, standard deviation
ad calibration curve graph.
Connections:
Two USB ports: one on the
back and one on the side, a
PS2 Connection and a
USB port for a mouse or
keyboard and a direct
Ethernet connection to the
web for customer support
located on the rear panel.
The MESA-7220 Meets the ASTM D7220 Method Requirements

6. © 2015 HORIBA, Ltd. All rights reserved. 6
5 Things to Know About the MESA-7220 for Tier 3 Sulfur Testing
1) The MESA-7220 requires minimal space because this
vacuum based analyzer is compact and self-contained
with integrated electronics and computer.
2) It requires only a stable source of electrical power
(100/250 VAC), but no other utilities or gases.
3) It can be used at back-up locations and in mobile labs
because of its low weight and transportable case.
4) It provides the cost benefit of measuring other
elements simultaneously with sulfur if desired.
5) Its value for Tier 3 ULSG measurements may achieve
a return on investment in less than one week for a
8/5/52 work schedule.

7. © 2015 HORIBA, Ltd. All rights reserved. 7
http://www.horiba.com
1) Order Your Own
2) Schedule a Demonstration
3) Request a Quote
4) Browse Our Website
5) Call, e-Mail or Write Us
Learn More About the MESA-7220 EDXRF
1-800-446-7422
HORIBA INSTRUMENTS
SLFA Products
9755 Research Drive
Irvine, CA 92618 USA

8. © 2015 HORIBA, Ltd. All rights reserved. 8
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