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GC Multiresidue Pesticide Standard #9 (8 components)

Organophosphorus Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 9...

GC Multiresidue Pesticide Standard #1 (16 components)

Organophosphorus Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 1...

GC Multiresidue Pesticide Standard #3 (25 components)

Organonitrogen Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 3...

GC Multiresidue Pesticide Standard #4 (28 components)

Organonitrogen Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 4...

GC Multiresidue Pesticide Standard #5 (34 components)

Organonitrogen Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 5...

GC Multiresidue Pesticide Standard #6 (18 components)

Synthetic Pyrethroid Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 6...

GC Multiresidue Pesticide Standard #7 (10 components)

Herbicide Methyl Esters

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 7...

GC Multiresidue Pesticide Standard #8 (24 components)

Organophosphorus Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 8...

GC Multiresidue Pesticide Standard #2 (40 components)

Organochlorine Compounds

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Formulated ... , botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.Ampul 2...

GC Multiresidue Pesticide Kit

..., botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements...

Residual Pesticides Analysis of Botanical Ingredients Using Gas Chromatography Triple Quadrupole Mass Spectrometry

...dietary supplements are made from various dried botanicals, which may contain residual pesticides from agric ... Dietary supplements, which are consumed worldwide, are made from various botanical ingredients . Issues arise, however, due to the fact these botanical samples are dried and cause large interferences ... botanical, GC-MS/MS, QuEChERS, pesticides...

News: Residual Pesticides Analysis of Botanical Ingredients Using Gas Chromatography Triple Quadrupole Mass Spectrometry

Author(s): Riki Kitano1, Tairo Ogura1, Nicole Lock1, Robert Clifford1, Julie Kowalski2, Jack Cochran2, Dan Li2 1. Shimadzu Scientific Instruments, Inc. 2. Restek Corporation Published By: Restek Corporation Year of Publication: 2019 Link: www.restek.com/Technical-Resources/Technical-Library/Foods-Flavors-Fragrances/fff_FSAR3080-UNV Abstract: Dietary supplements, which are consumed worldwide, … Continue reading

ChromaBLOGraphy: Potions, Lotions and Labels…Oh my!

Like a lot of women, I have a bathroom full of lotions, perfumes and other potions. Many of these products contain natural ingredients like botanicals and essential oils. Not all things from Mother Nature are safe (I guess she can have a temper!) and consumers are becoming wise to this. The FDA is cracking down [...]

ChromaBLOGraphy: Pesticides in Dietary Supplements

I was at the Recent Advances in Food Analysis conference in Prague last week and presented work on analyzing pesticides in dietary supplements, a very important subject given that FDA is moving to regulate these products. They are very complex herbal, botanical, etc. materials, which makes looking for trace level components very tricky. My colleagues, [...]

ChromaBLOGraphy: Is There Vitamin P in your Dietary Supplement? Use QuEChERS and find out.

My colleagues Jason Thomas, Michelle Misselwitz, Julie Kowalski and I recently developed a QuEChERS extraction approach for pesticides (Vitamin P) in dietary supplements, including dandelion, ginseng, barberry, sage, yellow dock, green tea, and finished products (blends of individual botanicals). We found that dispersive solid phase extraction (dSPE) did not have the capacity to clean up [...]

News: Fortify or Calibrate for 203 Pesticides by GC-MS/MS With This Single Restek® CRM Kit

GC-MS/MS is the technique of choice for analyzing pesticide residues in many fruits, vegetables, botanicals, and herbals like tea, ginseng, ginger, Echinacea, and dietary supplements. And Restek’s new GC-MS/MS pesticide reference standards kit contains over two hundred compounds pulled from … Continue reading

News: Analysis of Pesticides in Dietary Supplements: Evaluation of QuEChERS, Cartridge SPE Clean-Up, and Gas Chromatography Time-of-Flight Mass Spectrometry

Author(s): Julie Kowalski, Michelle Misselwitz, Jason Thomas, Jack Cochran Published By: Agro FOOD INDUSTRY Hi-tech today Issue: Sept./Oct. Focus on Food Analysis supplement, vol. 22, no. 5 Year of Publication: 2011 Link: http://agro-food-industry.teknoscienze.com/testata.asp?id_testata=244&folder=supplements Abstract: New requirements for dietary supplements to … Continue reading

News: QuEChERS, GC Smoke Out Tobacco Pesticides

Author(s): Michelle Misselwitz, Jack Cochran, Julie Kowalski Restek Corporation Published By: Chromatography Techniques Year of Publication: 2014 Link: http://www.chromatographytechniques.com/articles/2013/12/quechers-gc-smoke-out-tobacco-pesticides Abstract: Pesticides are used heavily on tobacco in order to increase crop production value; however, limited regulation creates the potential for high … Continue reading

News: Developing New Methods for Pesticides in Dietary Supplements

Author(s): Julie Kowalski, Michelle Misselwitz, Jason Thomas,  Jack Cochran Published By: Food Safety Magazine Issue: February/March 2012 Year of Publication: 2012 Link: http://www.foodsafetymagazine.com/article.asp?id=3876&sub=sub1 Abstract: New requirements for dietary supplements to be manufactured under current Good Manufacturing Practices (cGMP) regulations have created a … Continue reading

News: Evaluation of QuECheRS, Cartridge SPE Cleanup, and Gas Chromatography Time-of-Flight Mass Spectrometry for the Analysis of Pesticides in Dietary Supplements

Author(s): Julie Kowalski, Michelle Misselwitz, Jason Thomas, Jack Cochran Published By: LCGC North America Year of Publication: 2010 Link: http://www.chromatographyonline.com/lcgc/Articles/Analysis-of-Pesticides-in-Dietary-Supplements/ArticleStandard/Article/detail/697436 Abstract: The FDA is responsible for regulation of dietary supplements as foodstuffs through the 1994 Dietary Supplement Health and Education … Continue reading

ChromaBLOGraphy: Modifying QuEChERS for complicated matrices- Dry Samples

Before getting in to this discussion, I recommend reading my previous blog post first regarding classical applications for methods based on Quechers. https://blog.restek.com/quechers-dspe-selection-which-one-is-best/ QuEChERS methods were originally written to analyze pesticides in fruit and vegetable matrices, most of which have high water content and low fat content. More recently, the technique has been used for […]

Residual Pesticides Analysis of Botanical Ingredients Using Gas Chromatography Triple Quadrupole Mass Spectrometry (PDF 2566kB)

... supplements are made from various dried botanicals, which may contain residual pesticides from agricultural creates an optimum data acquisition time program (Figure 1). Residual Pesticides Analysis of Botanical...

High-Resolution GC Analyses of Fatty Acid Methyl Esters (FAMEs) (PDF 2766kB)

... columns, the trans forms of the FAMEs elute before the cis forms. Analyzing Botanical Products Gas chromatography can be used to analyze fatty acid marker compounds in some botanical products. Both Rtx...

Matrix Effects in Multi-Residue Pesticide Analysis When Using Liquid Chromatography-Tandem Mass Spectrometry

..., such as botanical samples. Third, it is laborious and time-consuming to prepare matrix-matched calibration standards...

High-Resolution GC Analyses of Fatty Acid Methyl Esters (FAMEs)

...alyzing Botanical Products Gas chromatography can be used to analyze fatty acid marker compounds in some botanical products. Both Rtx-Wax and Stabilwax capillary columns provide the efficiency and sele...

Restek GCxGC Columns: Your One Source for 2D Gas Chromatography (PDF 9170kB)

... are botanically based, pesticide residue methods are among the new analyses being developed. Because plant...

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Residual Pesticides in Botanicals by GC-MS/MS

GC_FS0568

Column: Rxi-5ms, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13423), using Rxi guard column 5 m, 0.25 mm ID (cat.# 10029), with SilTite μ-Union connector kit (cat.# 23885)
Injector: Pulsed Splitless
Detector: Shimadzu GCMS TQ8040

dSPE vs. cSPE Sample Cleanup of Dandelion Root Powder (Dietary Supplement) on Rxi-5Sil MS

GC_FF1171

Column: Rxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Injector: Splitless
Detector: MS-Scan

Carfentrazone Ethyl in Dandelion Root Powder (Dietary Supplement) on Rxi-5Sil MS

GC_FF1172

Column: Rxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Injector: Splitless
Detector: MS-Scan

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