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GC Multiresidue Pesticide Standard #9 (8 components)

Organophosphorus Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #9 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #1 (16 components)

Organophosphorus Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #1 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #3 (25 components)

Organonitrogen Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #3 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #4 (28 components)

Organonitrogen Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #4 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #5 (34 components)

Organonitrogen Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #5 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #6 (18 components)

Synthetic Pyrethroid Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #6 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #7 (10 components)

Herbicide Methyl Esters

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #7 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #8 (24 components)

Organophosphorus Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #8 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #2 (40 components)

Organochlorine Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables requirements.Restek is your complete supplier for world-class GC-MS/MS multiresidue pesticide analysis ... GC Multiresidue Pesticide Standard #2 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Kit

...Cat.# 32563: GC Multiresidue Pesticide Standard #1 (16 components -03-8)Cat.# 32564: GC Multiresidue Pesticide Standard #2 (40 components)Organochlorine ... GC Multiresidue Pesticide Kit ... for world-class GC-MS/MS multiresidue pesticide analysis: reference and internal standards, Rxi-5ms GC columns, Q-sep QuEChERS sample preparation, inlet liners, accessories, and more ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables...

Accurately Quantify 380 Pesticides Using LC-MS/MS and GC-MS/MS (PDF 6072kB)

...Accurately Quantify 380 Pesticides Using LC-MS/MS and GC-MS/MS with Restek’s Multiresidue compound. LC_FF0524 Perform Quantitative GC-MS/MS Multiresidue Pesticide Analysis of 203 Compounds ... GC-MS/MS, global food safety, Multiresidue Pesticide Standard, Certified Reference Materials...

Analysis of Pesticides and Mycotoxins in Cannabis Brownies (PDF 2464kB)

... a starting point for similar matrices. Both LC-MS/MS and GC-MS/MS were employed and excellent results for LOQ μL aliquot of final extract was injected into the LC-MS/MS system. For GC-MS/MS analysis...

ChromaBLOGraphy: the wait is over…our new GC-MS/MS is here!

Boy, am I excited! I have been lucky in my career. I have used many different chromatography techniques…both GC and LC…and used many different types of detectors. I have to be honest, I love mass spectrometers and I try to spend most of my time using one. I have spent some time working with LC-MS/MS [...]

ChromaBLOGraphy: You want them, I got them…a lot of them: pesticides GC-MS/MS transitions

I can tell you that determining transitions (SRMs) for GC-MS/MS can be quite challenging with so many precursor ions to evaluate. I spent a considerable amount of time optimizing transitions for our GC Multiresidue Pesticide Kit which has 203 compounds. That is a lot of transitions to evaluate! I also tested my chromatographic method for […]

ChromaBLOGraphy: Which GC instrument should I use for the analysis of pesticides in herbal tea? GC-MS/MS or GCxGC-TOFMS?

You may remember a while ago I posted a blog about the analysis of herbal tea using QuEChERS and GCxGC-TOFMS.   The LECO Pegasus GCxGC-TOFMS is a great instrument for analyzing complex samples because of the comprehensive chromatographic separation achieved (two columns with different selectivities).  The GCxGC-TOFMS also excels at non-target screening of compounds.  Lucky for […]

Analytical Method for Polycyclic Aromatic Hydrocarbons (PAHs) in Yerba Mate Tea Using Modified QuEChERS, Solid Phase Extraction and GC-TOFMS and GC-MS/MS (PDF 634kB)

... Mate Tea Using Modified QuEChERS, Solid Phase Extraction and GC-TOFMS and GC-MS/MS By Julie Kowalski -TOFMS with hydrogen carrier gas and GC-MS/MS. Incurred values of PAHs determined via GC-TOFMS and GC-MS/MS compared...

Rugged, Low-Bleed Performance for Challenging GC-MS Work (PDF 4054kB)

...Rxi-5Sil MS Columns Rugged, Low-Bleed Performance for Challenging GC-MS Work Part of the Rxi GC are getting tighter. Newer GC-MS and GC-MS/MS instruments have been developed to increase overall...

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

Optimizing GC-MS and GC-MS/MS Analysis of 3-MCPD and Glycidyl Esters in Edible Oils (PDF 743kB)

...www.restek.com Optimizing GC-MS and GC-MS/MS Analysis of 3-MCPD and Glycidyl Esters in Edible in detail, very little attention is paid to the GC-MS analysis method. With emerging automated systems...

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

...tracted interferences, and because the triple quadruple mass spectrometer (GC-MS/MS) is highly sensitive this ide Kit (cat.# 32562) QuEChERS Internal Standard Mix for GC-MS A ... in the chromatography. This study shows that the modified QuEChERS method combined with GC-MS/MS achieves consistent ... botanical, GC-MS/MS, QuEChERS, pesticides...

ChromaBLOGraphy: QuEChERS Acetonitrile Injections Still Problematic for Gas Chromatographers at the European Pesticide Residue Workshop

Acclaimed pesticide residue chemist Richard Fussell from the Food and Environmental Research Agency in the UK gave an excellent talk today at EPRW called “High Sensitivity GC-MS/MS: A Robust Technique for the Direct Analysis of Pesticides in QuEChERS Acetonitrile Extracts”.  One of the main themes of his talk was using more sensitive instrumentation to deal [...]

News: Attend Restek’s Vendor Seminar on GC-MS/MS Performance at RAFA 2015

In addition to exhibiting, Restek will hold a vendor seminar at the 7th International Symposium on Recent Advances in Food Analysis (RAFA). Presented by Restek’s own Julie Kowalski on November 5 at 1:30 p.m., this valuable seminar will explore prolonging … Continue reading

ChromaBLOGraphy: 7th International Symposium on Recent Advances in Food Analysis (RAFA)

The 7th International Symposium on Recent Advances in Food Analysis, better known in short as RAFA, starts this week in Prague, The Czech Republic.  This is my tenth anniversary for this biennial meeting, where the organizer, Jana Hajšlová, invited me to give the lecture, Using the QuEChERS Sample Preparation Method and GCxGC-TOFMS to Determine Pesticides […]

News: Cochran to Present at International Symposia on Recent Developments in Pesticide and POPs Analysis

Restek’s Jack Cochran will be a featured speaker at both the 1st International Symposium on Recent Developments in Pesticide Analysis and the 10th International Symposium on Recent Developments in POPs Analysis. Both symposia are free, two-day events organized by Thermo … Continue reading

Growing Analytical Solutions for Cannabis Testing: Innovative Products and Expertise for Fast, Accurate, Reliable Results (PDF 8494kB)

... to move to MS due to regulation changes. For labs using GC equipment, you can analyze cannabinoids critical cannabinoids in minutes by GC using an Rxi-35Sil MS column. 1 2 3 4 5 6 7 8 9 10 80 100...

ChromaBLOGraphy: EPRW: European Pesticides Residue Workshop in Sunny Cyprus

                                    Just wanted to let everyone know that we have published our presentations we presented at EPRW (European Pesticide Residue Workshop) last month in Limassol, Cyprus. It was a great meeting in a beautiful location. It was a pleasure to […]

Analysis of Pesticides and Mycotoxins in Cannabis Brownies

... a starting point for similar matrices. Both LC-MS/MS and GC-MS/MS were employed and excellent results for LOQ system. For GC-MS/MS analysis, the remaining supernatant was transferred to a Q-sep QuEChERS d ... for similar matrices. Both LC-MS/MS and GC-MS/MS were employed and excellent results for LOQ, linearity...

Combined Determination of 1,4-Dioxane and Nitrosamine Contaminants in Drinking Water Using SPE and CSR-LVSI GC-MS (PDF 793kB)

...-LVSI) With EI GC-MS By Chris Rattray and Jack Cochran Abstract Global concern over the carcinogenic potential –mass spectrometry (GC-MS) method using electron ionization (EI), while Method 521 requires positive chemical...

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

... interferences, and because the triple quadruple mass spectrometer (GC-MS/MS) is highly sensitive this allows for GC-MS Analysis (cat.# 33267) • SV Internal Standard Mix (cat.# 31206) • Q-sep QuEChERS Extraction...

ChromaBLOGraphy: Wildfires in the Western United States: The smoke can be as dangerous as the flames, especially for firefighters.

The drought continues and wildfires are raging across the Western United States.  In Washington State alone, the wildfires have burned over 1400 square miles (that’s 3600 km2).  Brave men and women from across the United States are coming to the aid and trying to contain these historical fires.  Unfortunately lives of the firefighters are in […]

ChromaBLOGraphy: Fast Sample Preparation and Shoot-and-Dilute GC for Flame Retardants in Fish

The shoot-and-dilute GC technique (split injection) is perfectly matched for the fast sample preparation approach of QuEChERS.  The QuEChERS concept provides a fast, multi-residue extraction and “just enough” cleanup.  The technique is quick and minimizes solvent usage, but the resulting extract can contain a large amount of coextracted nonvolatile material.  A split injection is an […]

News: Restek’s Jaap de Zeeuw to Present at Food Science 2016 in Singapore

On November 16–17, Separation Science will again host Food Science 2016 in Singapore. This world-class international conference and exhibition covers key food analysis topics including safety, traceability, authenticity, and ingredients analysis. Restek invites you to attend the show at a … Continue reading

ChromaBLOGraphy: Not Every Matrix-Matched Calibration Is Made Equal – Case of Spinach

Matrix-matched calibrations are a popular option for complex matrices, such as food commodities. When it is employed, one can assume that the majority of matrix effects will be accounted for and there won’t be much difference between calibration standards and the tested samples. But are all matrix-matched calibrations equal? In the case of QuEChERS extraction, […]

News: Combined Determination of 1,4-Dioxane and Nitrosamine Contaminants in Drinking Water Using a Single SPE Cartridge and Concurrent Solvent Recondensation–Large Volume Splitless Injection (CSR-LVSI) With EI GC-MS

Author(s): Chris Rattray and Jack Cochran Restek Corporation Published By: Restek Corporation Year of Publication: 2014 Link: http://www.restek.com/Technical-Resources/Technical-Library/Environmental/env_EVAN1922-UNV Abstract: Global concern over the carcinogenic potential of 1,4-dioxane and several nitrosamines has resulted in increased interest in the development of more … Continue reading

ChromaBLOGraphy: The Most Useful Pesticide Standard Ever…monitoring GC inlet “dirtiness”

I have spent most of my time over the past several years testing pesticides and there is one standard that I simply can’t live without…QuEChERS Performance Standards Kit. It is based on a really interesting article* on analyte protectants with a few compounds added. The standard has 40 compounds housed in three vials for long […]

Growing Analytical Solutions For Cannabis Testing Innovative Products And Expertise For Fast, Accurate, Reliable Results

... be directly transferred to LC-MS, if you ever need to move to MS due to regulation changes. For labs using GC . Figure 2: Determine critical cannabinoids in minutes by GC using an Rxi-35Sil MS column ... from the very beginning. We have the GC and LC products and expertise you need today for analyzing...

Optimizing GC-MS and GC-MS/MS Analysis of 3-MCPD and Glycidyl Esters in Edible Oils

... extraction and derivatization techniques in detail, very little attention is paid to the GC-MS analysis acid (PBA) to improve analyte volatility and make them more amenable to GC separation and MS or MS/MS ... In this work, we developed an improved, indirect GC-MS method for the analysis of 3-MCPD...

ChromaBLOGraphy: Pesticide analysis for cannabis flower: method and data overview

Pesticides in cannabis has been a hot topic lately and we have been getting many requests for help with this analysis. We did work on pesticide residue testing in cannabis about 6 years ago. At that time, we were limited to testing our methods with a small amount of seized material. Recently, we have been […]

Analytical Method for Polycyclic Aromatic Hydrocarbons (PAHs) in Yerba Mate Tea Using Modified QuEChERS, Solid Phase Extraction and GC-TOFMS and GC-MS/MS

...-TOFMS with hydrogen carrier gas and GC-MS/MS. Incurred values of PAHs determined via GC-TOFMS and GC-MS/MS compared EChERS extraction and solid phase extraction sample cleanup. Both GC-TOFMS and GC-MS/MS techniques were used ... QuEChERS extraction and solid phase extraction sample cleanup. Both GC-TOFMS and GC-MS/MS techniques...

News: Michelle Misselwitz to Present at BFR 2015 in Beijing

The 7th International Symposium on Brominated Flame Retardants (BFR 2015) will be held April 21–24, 2015 in Beijing. Michelle Misselwitz, a leader in BFR work at Restek, will attend and present her most recent work on improving the analysis of … 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 […]

ChromaBLOGraphy: Tips on the analysis of pesticides and mycotoxins in cannabis products: Matrix matters! (Part I)

The growing variety of cannabis products that are currently available in the market speaks volumes about the creativity of entrepreneurs within the industry. Vapes, lotions, balms, cookies, hard candy, gummies, infused drinks, chocolate, fudge, soaps, and tinctures are only a handful of the product types that are currently being commercialized in this ever-growing market. Such […]

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