|
 Pacific™
O&G SPE Disk
The
economical choice for quality results at the
lowest cost
Method
1664 is a performance-based method that requires
the use of n-hexane as the extraction solvent
and gravimetry as the determinative technique.
Alternative extraction and concentration techniques
are allowed, provided that the performance
specifications are met. In addition, QC procedures
designed to monitor precision and accuracy
have been incorporated into Method 1664A.
 Pacific™
Premium O&G SPE Disk
The
first-class option for 1664A modifications
(1664B)
The
Pacific Premium disk is ideal for 1664A modifications
and will continue to be once 1664B is promulgated.
This disk is fully compliant due to the minimal
water retention and improved recoveries for
those labs using approved water soluable solvents
such as Methenol.
By
using the Pacific Premium disks, available
in both 47 mm and 90 mm, you can expect recoveries
in the high 95th percentile.
EPA
Method 1664B
| Horizon
Technology Pacific O&G SPE Disks
continue to receive excellent results
from laboratories running EPA Method
1664A - for both recovery rates
and cost savings. |
|
These
rigorous QC requirements
can present challenges for some laboratories
moving away from Freon-113 based liquid-liquid
extractions. The “performance based” method
utilizes n-Hexane rather than Freon as
the extraction solvent. But, Hexane is
prone to form emulsions during LLE and
the hexane floats whereas Freon sinks.
SPE eliminates problems associated with
LLE using hexane. |
Using a combination
of advanced liquid handling
techniques, Horizon
Technology Pacific™ O&G SPE Disks,
and the Horizon Technology SPE-DEX®
3000XL Automated Extraction System, your laboratory
will receive the accuracy and consistency
of data you need to comply with EPA Method
1664A QC specifications.
|
Horizon
Technology offers the only fully-automated
SPE extraction system —
a complete turnkey Oil & Grease
solution for EPA Method 1664A.
|
|
 Each
laboratory is responsible for operating
a formal quality assurance program. For
Method
1664A, the minimum requirements include
an initial demonstration of laboratory
capability (IPR), MDL study, ongoing analyses
of standards and blanks (OPR), and analysis
of a matrix spike. |
Each
time a modification is made to Method 1664,
the laboratory is required to repeat the IPR
test and, if the detection limit will be affected
by the modification, the laboratory is also
required to repeat the MDL study.
The
data below was obtained from a Horizon Technology
customer, an independent petroleum refinery.
Pacific™ O&G Disks were utilized,
using a Horizon Technology automated extraction
system. In a comparison of the results for
SPE and LLE, the SPE data shows greater precision
and accuracy.
| Sample |
LLE
(mg/l) |
%
Recovery |
SPE
(mg/l) |
%
Recovery |
|
1
|
35.0
|
87.5
|
40.3
|
100.8
|
|
2
|
32.0
|
80.0
|
39.5
|
98.8
|
|
3
|
34.2
|
85.5
|
39.9
|
99.8
|
|
4
|
31.9
|
79.8
|
40.1
|
100.3
|
|
Average
|
|
83.2
|
|
99.9
|
|
Standard
Deviation
|
3.91
|
|
0.85
|
|
Call
today and request a sample pack
and discover the value that Horizon Technology
Pacific™
O&G SPE Disks can bring to your laboratory.
| Ordering
Information |
| Item
Description |
Part
Number
|
| Pacific™
O&G Disk - 47mm |
1664-47-HT
|
| Pacific™
O&G Disk - 90mm |
1664-90-HT
|
| Pacific™
Premium O&G Disk - 47mm |
1664-47-PHT
|
| Pacific™
Premium O&G Disk - 100mm |
1664-100-PHT
|
| Pacific™
O&G Fast Flow Pre-Filter - 47mm |
FFP-47-HT
|
| Pacific™
O&G Fast Flow Pre-Filter - 90mm |
FFP-90-HT
|
|
