Pickering Laboratories - Analysis of Mycotoxins in Hemp and Hemp- Containing Edible Products
Pickering Laboratories developed an easy and sensitive method to analyze aflatoxins B1, B2, G1, G2, and ochratoxin A in hemp and hemp-containing edible products. Mycotoxins are isolated using immunoaffinity clean-up columns and analyzed with fluorescence detection. To increase sensitivity of aflatoxins B1 and G1, an in-line photochemical reactor (UVETM) is installed before the detector. This method utilizes standard HPLC equipment and allows laboratories to easily determine these mycotoxins at low ppb levels.
Method
Isolation of aflatoxins B1, B2, G1, G2, and ochratoxin A
Blend 1 g of finely ground sample with extraction solution (10 mL of methanol/water 80:20) using a handheld homogenizer. Centrifuge for 10 min. Mix 2 mL of the extract with 10 mL of PBS buffer (containing 2% Tween 20). Clean the extracts using AflaOchra HPLC immunoaffinity column (Vicam).
Analytical Conditions
Analytical Column: MycotoxTM (Pickering), C18, 4.6 × 250 mm
HPLC eluent: sodium phosphate buffer (Cat #1700–1108), methanol, acetonitrile
Flow rate: 1 mL/min
Post-column photochemical reactor: UVE (Cat # 10519 (240V), Cat # 10742 (120 V) FLD: Excitation 36 nm, Emission 430 nm for Aflatoxins Excitation 333 nm, Emission 477 nm for Ochratoxin A.
Calibration
The 5-point calibration curves were built in the ranges of 0.325– 3.25 ppb for B1, 0.088–0.882 ppb for B2, 0.310–3.099 ppb for G1, 0.099–0.996 ppb for G2, and 1–10 ppb for ochratoxin A. Correlation coefficient was R2 >0.999 for all toxins.
Figure 1: Chromatogram of hemp pre-roll spiked with 6.5 ng/g of aflatoxin B1; 1.8 ng/g of aflatoxin B2; 6.1 ng/g of aflatoxin G1; 1.9 ng/g of aflatoxins G2; and 20.1 ng/g of ochratoxin A.
Figure 2: Chromatogram of hemp-containing chocolate spiked with 6.5 ng/g of aflatoxin B1; 1.8 ng/g of aflatoxin B2; 6.1 ng/g of aflatoxin G1; 1.9 ng/g of aflatoxins G2; and 20.1 ng/g of ochratoxin A.
Pickering Laboratories
1280 Speca Park Way, Mountain View, CA 04043
tel: (800) 654-3330, (650) 694-6700
Website: www.pickeringlabs.com
The Benefits of Custom Bonded Silica
April 1st 2025Not all chromatography resins are created equal. Off-the-shelf chromatography resins might not always meet the rigorous purification requirements of biopharmaceutical manufacturing. Custom bonded silica from Grace can address a wide range of separation challenges, leading to real performance improvements. Discover more about the latest innovations in chromatography silica from Grace, including VYDAC® and DAVISIL®.
5 Things to Consider When Selecting a Chromatography Silica
April 1st 2025Particularly in the pharmaceutical industry, drug purity isn’t just a goal – it’s essential for achieving safety, stability and efficacy. However, purification is easier said than done, especially with challenging molecules like DNA and RNA “oligonucleotides,” due in large part to their diversity and the range of impurities that can be generated during production. Enter DAVISIL® chromatographic silica, with a wide range of pore diameters and particle sizes to meet your specific application, performance and sustainability requirements. Before you choose the chromatography resin for your next purification application, take a look at these 5 considerations.
Automating Protein Purification: Efficiency, Yield, and Reproducibility
March 27th 2025Recent advancements in automated protein purification stress the importance of efficiency, scalability, and yield consistency. This eBook compares different purification platforms, highlighting their impact on downstream applications and demonstrating how automation enhances throughput and process control.
MilliporeSigma: Ultrapure Water for Sensitive LC-MS Analysis of Pesticides
March 25th 2025The aim of the study was to illustrate the efficiency of Milli-Q® water purification systems in eliminating pesticides from tap water, thereby producing and delivering reliable and consistent-quality ultrapure water suitable for pesticides analysis
