Pressurized Fluid and Dispersive Solid Extraction


Our Senior Application Scientist, Patricia Atkins, recently sat down with Cannabis Science and Technology for a 2 part interview discussing the latest developments in cannabis science.

In part 1, Patricia Atkins discusses her work using pressurized fluid and dispersive solid extraction to maximize analytical cannabis extractions and sample clean-up. You can view part 1 here.

In part 2, Patricia Atkins discusses the next steps in her Cannabis-related research and what excites her most in the field. You can view part 2 here.

Do You Know What Goes Into Your Favorite Fireworks Display? Chemistry!

An exploding firework is essentially a number of chemical reactions happening simultaneously or in rapid sequence. When you add some heat, you provide enough activation energy (the energy that kick-starts a chemical reaction) to make solid chemical compounds packed inside the firework combust (burn) with oxygen in the air and convert themselves into other chemicals, releasing smoke and exhaust gases such as carbon dioxide, carbon monoxide, and nitrogen in the process.


Do you know what elements are used to create your favorite color fireworks?

Chemistry of Fireworks-Graphic Only-01

Chemistry of Hot Sauce

various barbecue sauces in glass bottles

Here’s a New Episode of SPEX Speaks Science
The Chemistry of Hot Sauce

Abstract: The rise of popularity of spicy products and hot sauce has skyrocketed over the last decade. Hot sauces have gone from a few well known brands to a cottage boutique market and an international obsession. In this podcast, we will look at the chemistry of hot peppers and hot sauces and how these products affect the body.

Click here to listen to our latest episode

Common Terpenes and Terpenoids

Check out our infographic on some of the common terpenes and terpenoids, then listen to our latest episode of SPEX Speaks Science where we discuss the Chemistry of Fragrance and Flavor and how those chemical reactions equate to familiar tastes and scents.


You can also listen to SPEX Speaks Science on


Introducing SPEX Speaks Science Podcast


SPEX Speaks Science is the bi-weekly podcast presented by SPEX CertiPrep. Hosted by Senior Applications Scientist, Patricia Atkins, SPEX Speaks Science looks to deliver informative content to the scientific community. SPEX CertiPrep has been servicing the scientific community since 1954. We are a leading manufacturer of Certified Reference Materials (CRMs) and Calibration Standards for Analytical Spectroscopy and Chromatography.

Episode 1: History of Pesticides

Abstract: Pesticides are now a daily part of our world, from the anti-bacterial soaps we use to the commercial pesticides that are applied to our food. Despite the fact that the chemical age of pesticides has just skyrocketed in the last decade, the use of pesticides has been thousands of years in development.

Join SPEX CertiPrep as we look at the history of pesticides, the development of modern pesticides and how those pesticides are applied and regulated. We will examine the genesis of the chemical pesticide movement and explore the regulation, approval and application of modern pesticides and take a look into the future of pesticide management.

Click here to view Episode 1

The Perfect Brew-EPA Pesticide Mixes


Know Your EPA Method? We Have the Pesticide Standards Just for You!

SPEX CertiPrep offers Pesticide Standards for various EPA Methods including Drinking Water, Municipal and Industrial Waste, Environmental Samples, and more!
We help streamline your testing process by creating pre-made standards to suit your needs. Several stock pesticide mixes are readily available, along with over 4,000 individual components. Custom pesticide blends can also be manufactured to your specifications.


We Found the Perfect Witches’ Brew Recipe to Make
Your Halloween Even Spookier!

Tired of the same old cider and hot cocoa recipes? Try the bewitching brew ideas to liven up your celebration. And best of all, there is more than one recipe to choose from!
Source: Farmer’s Almanac

Check Out the “Clean 15”

EGW (Environmental Working Group) puts out the list of “Clean 15” and “Dirty Dozen” fruits and vegetables each year.

These 15 fruits and vegetables makes up the “Clean 15” list because they are the least likely to be contaminated with pesticide residues.

You can access the Clean 15 list on the EGW website at

Pesticide-Clean-15-Infographic 2018-01


SPEX CertiPrep • 203 Norcross Avenue • Metuchen, NJ 08840
732.549.7144 •

Pesticides in Wine and Beer

SPEX CertiPrep Application Note: Examination of Pesticides in Wine, Beer and their Constituent Products Using High-Throughput Techniques to Maximize Extraction & Efficiency.

There are hundreds of commercial pesticides in use in industrial and private agriculture. Concern over the health effects of residual pesticides on fruits and vegetables has led to increased testing of these products to determine the levels of pesticides on produce when it goes to market.

In this study, commercial red wine and beer samples were examined for their pesticide concentrations. In addition to the examination of the finished alcoholic beverage, the constituent agriculture products of wine and beer production (grains, malts hops and wine grapes) were also examined to determine the levels of pesticides found in those products. The sample preparation and extraction process efficiency and recovery were examined by processing samples using manual versus high-throughput techniques. The QuEChERS method was used to process a greater number of samples in a shorter period of time than other extraction methods.

Read the full application note here

SPEX CertiPrep • 732.549.7144 •

Here is the “Dirty Dozen”

The EGW (Environmental Working Group) has released the list of the 12 fruits and vegetables containing the highest pesticide residue levels.

You can view the list of the “Dirty Dozen” as well as various other resources on the EGW website at

Pesticide-Residue-Infographic-Dirty Dozen 2108-01

SPEX CertiPrep • 203 Norcross Avenue • Metuchen, NJ 08840
732.549.7144 •

Introducing Industrial Hygiene Filters!

SPEX CertiPrep offers a range of matrix-matched standards, specifically designed for the needs of various types of industrial hygiene and air monitoring programs.

The trace metals on mixed cellulose ester filters are specifically formulated to meet testing requirements such as National Institute for Occupational Safety and Health (NIOSH) 7300 Series Methods, ASTM Standard D7035, ISO Standard 15202-1 and 15202-2, and CEN (EN) Standard 13890.

Trace metals on quartz filters are designed to meet the testing requirements of EPA IO-3 and are also available as stock products.

Custom spiked filters are available upon request.

Click here for our App Note: An Overview of International Methods and Regulations for Airborne Metal Particulate.

Complete details here.

SPEX CertiPrep • 203 Norcross Avenue • Metuchen, NJ 08840
732.549.7144 • CRMMarketing@spex.com