Internal Standards and Quality Control Standards

  • Single and multiple component standards as specified in EN Method 15662
  • Support for GC and HPLC with MS, MS/MS, and selective detectors.
  • Ready to use QuEChERS extractions no dilutions necessaryProducts

Q-SEP2A

Restek Quechers - Methodology Overview
Restek On-line Presentation - Slide Show / audio
Product Overview PDF ask for detail Lit . . . reviewed
Quechers-SPE

Q-Sep2

Tubes for Extraction and Clean-up of Pesticide Residues from Food Products

  • Fast, simple sample extraction and cleanup using dSPE
  • Fourfold increases in sample throughput
  • Fourfold decreases in material cost
  • Convenient, ready to use centrifuge tubes with ultra pure, preweighed adsorbent mixes

Q-SEP2B

Quick, Easy, Cheap, Effective, Rugged, and Safe, the QuEChERS ("catchers") method is based on work done and published by the US Department of Agriculture Eastern Regional Research Center in Wyndmoor, PA.(1)
Researchers there were looking for a simple, effective, and inexpensive way to extract and clean pesticide residues from the many varied sample matrices with which they routinely worked.
They had been using the Modified Luke Extraction Method, which is highly effective and rugged, but is both labor and glassware intensive, leading to a relatively high cost per sample. Solid phase extraction also had been effective, but the complex matrices the investigators were dealing with required multiple individual cartridges and packings to remove the many classes of interferences, adding costs and complexity to the process.

A new method would have to remove sugars, lipids, organic acids, sterols, proteins, pigments and excess water, any of which often are present, but still be easy to use and inexpensive.

Q-Sep3A

The researchers developed a simple two-step procedure.
(1)    the homogenized samples are extracted and partitioned, using an organic solvent and salt solution.
Then, the supernatant is further extracted and cleaned, using a dispersive SPE technique. Multiple adsorbents are placed in a centrifuge tube, along with the 1mL of organic solvent and the extracted residues partitioned from step 1.
The contents are thoroughly mixed, then centrifuged, producing a clean extract ready for a variety of GC or HPLC analytical techniques
.(2) Validation and proficiency data for the QuEChERS method are available for a wide variety of pesticides in several common food matrices at www.quechers.com

Using the dispersive SPE approach, the quantity and type of adsorbents can be easily adjusted for differing matrix interferences and "difficult" analytes.
Results from this approach have been verified and modified at several USDA and Food and Drug Administration labs, and the method now is widely accepted for many types of pesticide residue samples.

Q-Sep3B

Restek Q-sep™ products make the QuEChERS approach even simpler. Extraction salts are preweighed and provided with 50mL centrifuge tubes. The dSPE centrifuge tubes, available in 2mL and 15mL sizes, contain magnesium sulfate (to partition water from organic solvent) and PSA* adsorbent (to remove sugars and fatty acids), with or without graphitized carbon black (to remove pigments and sterols) or C18 (to remove nonpolar interferences). Custom products are available by quote request. If you are frustrated by the time and cost involved with your current approach to pesticide sample extraction and cleanup, we suggest you try this simple and economical new method.

Q-Sep3C

Restek has products compliant with AOAC, Multi-miniresidue and European methods.
Click here for our complete Q-sep QuEChERS product listing.

Did You Know?

  • Multiple sorbents are used to remove different types of interferences.
  • MgSO4 - removes excess water
  • PSA* - removes sugars, fatty acids, organic acids, and anthocyanine pigments
  • C18 - removes nonpolar interferences
  • Carbone- removes pigments, sterols, and nonpolar interferences

*PSA  - primary and secondary amine exchange material.

Flyer

  • Restek QuEChERS Products: Fast, Simple Sample Prep for Multi-Residue Pesticide Analysis, FFFL1183 (622kb  acrobat-but 12p PDF

Application Note

  • Fast, Simple QuEChERS Extraction and Cleanup of Pesticide Residue Samples,
     08 GNAN1097 (165kb pdf) acrobat-but

QuEChERS Methodology Instruction Sheets

AOAC Approach,

Posters

  • Optimizing Dispersive Solid Phase Extraction and Splitless Injection-Gas Chromatography for QuEChERS Fruit and Vegetable Extracts (90kb pdf)

METHODS - links

QuEChERS

  • A Mini-Multiresidue Method for the Analysis of Pesticide Residues in Low-Fat Products (91kb pdf)

AOAC Official
Method 2007.01

Pesticide Residues in Foods by Acetonitrile Extraction and Partitioning with Magnesium Sulfate Gas Chromatography/
Mass Spectrometry and Liquid Chromatography/
Tandem Mass Spectrometry First Action 2007

European method CEN/TC 275 - EN_15662

Foods of plant origin Determination of pesticide residues using GC-MS and/or LC-MS/MS following acetonitrile extraction/
partitioning and cleanup by dispersive SPE  QuEChERS-method

We have products for
all of these methods!

Q-Sep

QuEChERS Products
Quick Easy Cheap Effective Rugged & Safe

SPE Cleanup Techniques using
Multiple Adsorbents for GC and HPLC

QuEChERS Standards
& SPE Tubes

Q-Sep3

NOW! Full integration >
Price database into FlipPAGE format . . .
$$$ vs Cat.#
1   partial ~1000 more popular items open
CT mini-SITE . . . mobile site
2   ALL Main Suppliers Current Prices may require UPDATING due to XRs etc
NEW SHOPPE via www.chromalytic.net.au

Our Policy / Strategy
No! . . .  we don’t “muck around”
we DON’T have time for
“twitter and tweats” NOR ANY of  that Facebook “crap”

AND
. . . NOR are We . . .traditional” or
 “used cr “Sales-people” type
. . . but MORE technically orientated !

So WE . . .
-   DON’T “Door Knock”
-   make “scam” calls, use "stooges"”
 tele-marketing methods
 or chain e-mails
-   NOR Waste YOUR valuable time
 . . . but . . . IF YOU WANT US ?
We are HERE !. . . have “targeted” tech information and analytical Chemistry products AND Solutions  . . .  >  just for You !

YES! . . .
We are here to
actuall TRY & help you
 !the proof !.
 . . EVEN our
direct competitors
 “USE” Us !

NEW 2015  HTML5 SHOP Site
New HTML5 improve HTML comapabilirt with AApple MAC, IPAD?Androids - but NO Flash

FlipShop SHOPPE

mini-site CHROMTECH

Copyright Copyright-Chromalytic Technology Pty Ltd 1995-2015+ : All rights reserved:  Supplier : Trademarks, Patents logos apply

this Website - best viewed in > ~1300px PC screen size with some APPLE MAC compatibility

 MobileSite  . for “MickeyMouse” phones

Chromtech Website > Chromalyic 2015+

Q-SEP Quechers

FlipPAGE CHROMTECH SUPPLIER Product List

HTML5 FAST SHOPPE here >

HTML5  -  NEW SHOPPE

HTML5  new

NEW 2027 Site Overview
www.chromtech-AUS.com

Parent Level

[SRI GCs]
[PeakSimple DataSystem]
[DET TID GC Detectors]
[PlasmaTek-Gas Analysis]
[ultraFAST GC]
[Pharma Vial Products]
[COntact]
[Syringes]
[LabGlass-Hardware]
[Vials-Syringes 10]
[more Chromtech products]
[Instrumentation-VICI]
[GasStandards-MESA]
[PC-Tech ValveControl]
[Laboratory Products]
[CHEMICAL Standards]
[RPC Silcosteel Treatment]
[HPLC Detector Lamps 09]
[Syringe Pumps]
[Membrane Solutions]
[Air Monitoring]
[Gas Systems]
[Sample Prep]
[Chiral HPLC Columns]
[AirComp VacPumps]

Current Level

Sample Filtration Products
Q-SEP Quechers

Child Level

[index]
 
TEXT SEARCH Site ONLY from the CLouds FAST !
goole this website

Chromtechs' Overall Site NAVIGATION
“Site” Overview more
Current /Flip/ DIR /PDF2/ DIR

our "other" SITES
index
Home CHROMTECH 2016
www.chromalytic.net.au
Mobile-(mini)Site
NEW2017 INTRO Site
www.chromtech-aus.com/
old(er) PC FLASH Slides
Flash-Flip Catalogs
Flash-HTM Pages
Site ADMIN
How to Place an Order
Information
FAQs-OurSite
CT-AUD Prices
Freight Charges
Trading Terms
Disclaimer-10
SEARCH
.
SUPPLIER
SRI GCs
RESTEK Chromatography
Instrumentation-VICIValco
VICI-Jour-NewProducts
PlasticFittings-VALUEPLASTICS
COntact
NUTECH Air Monitoring
GasStandards-MESA
NEW ERA Syringe Pumps
Membrane Solutions
DET TID GC Detectors
PlasmaTek-Gas Analysis
ultraFAST GC
.
Product CATAGORIES
GC Columns
Packed GC Columns
Chiral HPLC Columns
HPLC Columns
LC Columns
HPLC Accessories
Pharma Vial Products
Instrumentation Valves
PeakSimple DataSystem
Chromatography Tubing
Chromatography Fittings
Ferrules
Vials-Syringes 10
Glass Vials-Bottles
MS Sample Vials
Syringes
Syringe Pumps
Instrumentation Valves
Filtration Accessories
Fluid Transfer
CHEMICAL Standards
RPC Silcosteel Treatment
HPLC Detector Lamps 09
Air Monitoring
Gas Systems
.
SAMPLE PREP
Sample Prep
Filtration Products
Q-SEP Quechers
SPE-SamplePrep
MS-Syringe Filters
Membrane Filters
.
Literature - Technical
ADVantage News
Technical Notes
.
General LAB EQUIPMENT
BioBase
MRC LAB Products
PlasmaTek-Gas Analysis
LabGlass-Hardware
.
NEW HTML5 Site
HOME www.chromalytic.net.au
/html5_bookcases.htm
.
Summary DIR Listing
PDF Listing
/FlipPAGE/ Listing (older)
Flip HTML5 Listing
more see> chromalytic.net.au

PRODUCT LIST

> “main” Prices 

FlipBook-1 acrobat

Main Suppliers ONLY > ~30,000 Items > Current System Prices