Making You Feel Like You’re On Top of the World!


At SPEX CertiPrep, we go above and beyond to make you our priority!

It’s not only what we do, it’s how we do it. We have been manufacturing Inorganic and Organic Certified Reference Materials and Calibration Standards for the Analytical Spectroscopy and Chromatography communities since 1954. Our passion for science and dedication to the analytical community drives us to go above and beyond for you. We want to provide you with the customer experience you deserve and can rely on. We do this by making sure you are our priority in everything we do.

  • Over 60 years experience manufacturing Certified Reference Materials (CRMs)
  • Most comprehensive scope of accreditations and certifications in the industry
  • Selection of over 4,000 inventoried products
  • Stock products ship within 24 hours
  • Dedicated technical support to answer your CRM and lab questions
  • Custom standards manufactured upon request, based on your individual needs

Contact is today for all of your Certified Reference Material needs at 1.800.LAB.SPEX or email at

Decrease Your Waste and Save Your Space!


30 mL Plasma Shots® for ICP-MS and ICP

  • No excess toss
  • Volume accommodates infrequent analysis
  • 1/3 the price of larger volume standards
  • No hazardous shipping or disposal fees
  • Hazardous goods in excepted quantities
  • Ease of shipping
  • Custom packaging

Interested in our 30 mL Plasma Shots for your lab? Contact us today at 1.800.LAB.SPEX or email at

For additional product details, please visit

From Aluminum to Zirconium We’ve Got You Covered


30 mL Plasma Shots® for ICP-MS and ICP
Perfectly sized 30 mL Single Element Certified Reference Materials for ICP-MS and ICP

SPEX CertiPrep now offers 30 mL Plasma Shots for ICP-MS and ICP grade single element Certified Reference Materials. These 30 mL products deliver the same great SPEX CertiPrep quality in a smaller volume so you will have less waste.

With the added benefits of same day shipping and no hazardous shipping costs, these 30 mL Assurance® and Claritas PPT® CRMs offer accreditation by A2LA to ISO/IEC 17025 and ISO Guide 34.

Interested in custom 30 mL single element CRMs for ICP-MS or ICP? They are available with a minimum order order quantity of 3. Contact us today at 1.800.LAB.SPEX or email at

For additional product information, please visit

Where in the World is SPEX CertiPrep?

The month of March is proving to be very busy for our Sales and Marketing team here at SPEX. Here is a list of where you can find us as we make our way around the world!

  • What’s New In The Analysis of Complex Environmental Matrices?
    • March 3, 2017
    • London, UK
  •  Pittcon
    • March 5-March 9, 2017
    • Chicago, IL
  •  Laborama 2017
    • March 16-March 17, 2017
    • Belgium
  • ArabLab
    • March 20-March 23, 2017
    • Dubai, UAE
  • Analytica Vietnam
    • March 29-March 31, 2017
    • Hanoi, Vietnam
  • Forum Labo Paris
    • March 29-March 30, 2017
    • Paris, France
  • EuroLab
    • March 29-March 31, 2017
    • Poland
  • ChemBio
    • March 29-March 30, 2017
    • Finland

For a complete list of where you can find SPEX CertiPrep, please visit

What is Solubility?

Solubility is defined as a chemical property referring to the ability of a given substance, the solute, to dissolve into a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.

Click here to view out Guide to Solubility for 144 of the most commonly analyzed pesticides per EPA, AOAC, FDA and other international testing methods.

SPEX talks about Terpenes!


Cannabinoids and pesticides are normally the main focus of native and foreign chemical constituents found in cannabis. However, terpenes deserve their fair-share of the spotlight. Terpenes and their related terpenoids are the primary compounds in most botanicals and essential oils. Many consumer products rely on terpenes for their character, flavor and fragrances, making them ideal for foods and aromatherapy alike. For example, Myrcene, beta-Pinene, beta-Caryophyllene and alpha-Humulene are found in hops and important to the flavor and aroma of beer. Damascene and Geraniol provide the floral notes of wine grapes and roses.

Terpenes are of interest for both recreational and medical cannabis fields. Researchers are able to characterize different cannabis strains based on their terpene profiles. Terpene profiles allow recreational users to identify which flavors and fragrances they prefer. More importantly, research recognizes terpenes also have therapeutic benefits. For example, beta-Myrcene and Nerolidol are mild sedatives and Limonene an anti-inflammatory, each providing key therapeutic benefits. Some research also suggests terpenes work synergistically with themselves and other native compounds to enhance therapeutic effects, similar to the cannabinoid “Entourage Effect”.

As the industry evolves, the need for more accurate and precise analytical methods and standards will continue to grow. SPEX CertiPrep is proud to be at the forefront of the industry, continuously adapting our standards to comply with changing regulations and increasing consumer demand for safer products.

Check out our Cannabis CRMs for Medicinal and Recreational Cannabis Testing

Build Your Pesticide Library with SPEX CertiPrep Pesticide Mixes!

Tractor spraying pesticides

Premixed Pesticide Multi-Compound CRMs

Chemical pesticides have become an integral part of the agricultural toolbox, offering protection to crops from destructive pests. However, an unfortunate side effect of their uses is the potential leaching of these, oftentimes, harmful chemicals into the environment leading to their eventual presence in the human food chain. As a result, pesticide residue analysis has become a critical testing process for many different types of laboratories.

Unfortunately, pesticide residue testing is a long, expensive, and complicated process, covering hundreds of different compounds. Fortunately, as the leader in HPLC, GC, LC/MS, and GC/MS pesticide CRMs, SPEX CertiPrep is happy to assist our customers with all of your pesticide CRM needs.

For your convenience, we have designed a pesticide residue testing kit which includes 144 of the most commonly analyzed pesticides per EPA, AOAC, FDA and other international testing methods. The kit is structured to maximize stability and solubility, while minimizing unwanted analyte interaction and interference; enjoy shorter calibration times, fewer injections and money savings, as compared to purchasing individual pesticide standards.

For additional product information, please visit

Introducing Carbon Black Reagents for ASTM D1510

Details Matter…

Our sodium thiosulfate solutions are prepared from ACS Grade, micro-crystalline Na2S2O3. In order to maximize shelf life, our matrix is prepared using double-deionized, ASTM Type 1 Water.

Our iodine solutions are prepared from ACS Grade potassium iodide and crystalline elemental iodine. To guarantee a clean and stable product, our matrix is prepared using double-deionized, ASTM Type I Water.

All solutions are prepared gravimetrically, using high accuracy analytical balances, to ensure precise target concentrations. Each batch is thoroughly homogenized using a high speed industrial mixer to ensure reliable results from the first bottle to the last.

We are titrating our samples on our automated titrator. The automated dosing drive uses 10,000 steps over it 20 mL volume, so its dosing increment can be as small as 2 μL. For these applications, we are using a minimum dose of 10 μL for the sodium thiosulfate endpoint and 4 μL for the iodine endpoint. These settings achieve the extremely precise measurements for each titration while also staying within the parameters of the dosing unit.

As stated on our Certificate of Analysis, the sodium thiosulfate is run against a 0.1 N potassium dichromate solution. The exact normality of this solution is calculated by comparing it to NIST potassium dichromate. A set of 6 samples are run that must all be within the nominal value of 0.0394 N ± 0.00008 N.

Then the certified sodium thiosulfate is used to titrate iodine. A set of 3 samples are run that must all be within the nominal value of 0.0473 N ± 0.00003 N.

Before releasing either of these reagents for packaging, we run QC checks with a previous lot to ensure accuracy over time.

Click here for product listing or to request a FREE sample

SPEX CertiPrep Supports Breast Cancer Research and Awareness


SPEX CertiPrep Proudly Supports Breast Cancer Research and Awareness

Breast cancer awareness is an effort to raise awareness and reduce the stigma of breast cancer through education on symptoms and treatment. At SPEX CertiPrep we support the hope that greater knowledge will lead to earlier detection of breast cancer, which is associated with higher long-term survival rates, and that money raised for breast cancer will produce a reliable, permanent cure.

Donte to the cure!
SPEX CertiPrep will match 10% of the total donations

Please click here for details and to find out how to join SPEX CertiPrep in donating to this cause.

SPEX CertiPrep is Dressing in Pink!
Awareness needs to be ongoing. In addition to matching donations, SPEX CertiPrep is showing our support for Breast Cancer Research and Awareness in the following ways:

  • We’ve painted our website pink
  • Our products are dressed in pink – pink support ribbon stickers will be placed on bottle tops
  • Our employees will be wearing pink silicone bracelets
  • Our management team will be wearing pink lab coats
  • All web orders will receive a FREE pink vial rack