FEATURE ARTICLE:

Application Notes
Endocrine Disrupting Hormones, and Nonyl Phenol and Bisphenol A in Water

Determination of Endocrine Disrupting Hormones in Drinking and Waste Water Utilizing the Oasis® HLB SPE Disk ...more

Automated SPE Disk Extraction Method for the Analysis of Nonyl Phenol and Bisphenol A in Water Samples ...more

_________________________________________________

Determination of Endocrine Disrupting Hormones
in Drinking and Waste Water Utilizing the Oasis®
HLB SPE Disk

Hormones in drinking water are a growing concern, since the presence of these compounds can potentially be linked to serious health hazards such as human developmental and reproductive side-effects.

Hormones are introduced into our environment in several ways. Natural and synthetic hormones that are given to livestock, pass though the animals, runoff into surface water, and leach into underground water supplies. Humans also produce and excrete natural hormone waste every day. Human waste water flows through to sewage treatment plants, but waste treatment plants are not designed to be able to handle the removal of hormones, so the hormones filter though the treatment process, and can ultimately end up in drinking water.

>> Download the full application note, including chromatograms.
>> Request a free Oasis HLB Sample Pack

__________________________________________________________

Automated SPE Disk Extraction Method for the
Analysis of Nonyl Phenol and Bisphenol A in
Water Samples

Nonyl phenol and Bisphenol A are both of great environmental concern, as they have been classified as endocrine disruptors. Endocrine disruptors are those compounds that mimic estrogen and thus could induce hormonal responses. Because of this concern, nonyl phenol has been banned in the European Union as a hazard to human and environmental safety.

>> Download the full application note, including chromatograms.
>> Request a free Atlantic SPE DIsk Sample Pack

__________________________________________________________

TESTIMONIALS:

Customer Testimonials for Oil & Grease Systems and Products for EPA Method1664A

We're always getting feedback -— here's what some of our customers have to say about us.

SPE-DEX 3000XL Automated
Extractor System
We used to perform rainwater outfalls
(EPA 1664 Oil & Grease) by hand at about
4 - 6 samples a day. Now not only do we
do that - and the matrix blanks - in half that time, but the recoveries are better too.
Gordon Tatro, Environmental Chemist, Flint Hill Resources, Odessa, TX


SPE-DEX 3000XL Automated
Extractor System, Speed Vap III,
Solvent Trap
The transition from the SPE-DEX 4750
to the 3000XL made it easier for me to
analyze both clean and dirty samples.
I have been able to analyze samples with much more expedience and confidence in the results. As expansion is predicted in the future, I
would surely invest in another 3000XL.
David E. Canton, Environmental Lab Specialist, Hovensa LLC, Christinsted,Virgin Islands (U.S.)

Pacific Premium Oil & Grease Consumable Disk
After reviewing the data, the results
were excellent. There were five method
blanks that were analyzed, and four of the results were less than 1 mg/L and one was 1.6 mg/L. These values are well less than the laboratory reporting limit of 5 mg/L. There were also five laboratory control samples that were spiked at 40 mg/L. The results ranged from 86-98%; the method acceptance limit is 78-114% - again, the results were excellent
Peter Lemay, Organic Department Manager, Katahdin Analytical Services,
Scarborough, ME

__________________________________________________________

DID YOU KNOW:

Dirty Samples Slowing You Down?

Samples laden with fine particulates can quickly clog SPE disks, slowing or even stopping sample processing. For most samples, using a Pacific Fast Flow Prefilter will dramatically improve the flow rate; however, the worst samples will even clog the prefilter.

To ensure that no sample gets left behind, Horizon Technology has developed an ultra fine stainless steel screen to keep the fine particulates, like clay, algae and food products from entering the pores of the prefilter and disk. The stainless steel screen is simply placed on top of the prefilter and disk. The disk holder is then assembled as normal. After the sample has processed, the stainless steel screen is reusable after a quick cleaning.

In a flow study, adding the screen on top of the prefilter and disk allowed a one liter sample with fine particulates to pass in 30 minutes. The identical sample with no stainless steel screen slowed to a near standstill after 20 minutes and was eventually aborted after 1-½ hours with ½ liter of sample left.

A technical tip detailing the use of the stainless steel screen can be downloaded here.

Ordering Information:
The 47mm screen is part number 31-0454; and the 47mm Pacific Fast Flow Prefilter is FFP-47-HT. The 90mm screen is part number 31-0457; and the 90mm Pacific Fast Flow Prefilter is FFP-90-HT. To place an order call 1-800-997-2997, extension 618 or email orders@horizontechinc.com

If you have any questions about this or previous "Did You Know" topics please contact support-service@horizontechinc.com