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NCI, Hi-Purit QuEChERS Method for Pesticide Residue Analysis

Overview

In 2003, Michelangelo Anastassiades and Steven J Lehotay scientists developed similar groundbreaking sample prep methods to simplify the processing in labs for pesticide analysis in food, which is named QuEChERS. The "QuEChERS" (Quick, Easy, Cheap, Effective, Rugged and Safe) / dispersive SPE (DSPE) method, is a sample prep technique and has become popular in the area of multi-residue pesticide analysis in food and agricultural products, etc. NCI Hi-Purit QuEChERS significantly improves laboratory efficiency and throughput. This procedure requires only small quantities of solvent and is capable of generating recoveries of 80-110% with RSDs < 5% for a wide range of compounds. National Chromatography Inco, offers standard EN and AOAC QUECHERS kits, and also offers customized QuEChERS kits for customers, include different salt/sorbents pouches, extraction kit and clean-up kit.

A process in two steps

1. Extraction

  • Solvent extraction techniques are designed to achieve maximum yield of analytes from the base matrix.
  • Solvent selection is important to minimize co-extracting compounds.
  • Analytes are extracted from the matrix with acetonitrile and salts/buffers.
1st step: extraction

2. Clean-up

  • Sample clean-up is necessary to reduce interferences.
  • Interferences can damage analytical instrumentation and complicate analyte identification and quantification.
  • The use of PSA, C18, GCB (Graphitized Carbon Black) or Z-Sep sorbents allow removal of sugars, lipids, sterols, organic acids, proteins, carotenoids, chlorophyll and other pigments prior to a GC-MS/MS or LC-MS/MS analysis,
  • Homogenize sample
  • Transfer sample to 50mL tube
  • Add ACN and internal standard and shake for 1 min
  • Extraction: Add extraction salts and centrifuge
  • Clean-up: Transfer supernatant to clean-up tube
  • Shake and centrifuge
2nd step: Clean up

Instruments

a) LC-MS/MS Analysis: Dilute extract with mobile phase

b) GC-MS analysis: Analyze directly or after solvent exchange

Application

Sorbent blends with NCI Primary-secondary amine (PSA), C18 and Graphitized carbon black (GCB). The pre-weighed sorbents and buffers for use with both the AOAC (2007.01) and CEN (EN 15662) QuEChERS methods. The clean-up tubes are available in the standard 2 ml size as well as a 15 ml size for sample enrichment.

Advantages

  • Easy and straightforward methods that require little training
  • Decrease in overall sample preparation time.
  • Consistent and reliable devices from a single vendor
  • Efficient, cost effective method which can accommodate a wide variety of commodities
  • Improved consistency in extraction products
  • Improved lab efficiency and workflow
  • Improved quality

Features

  • Satisfactory recoveries for a wide variety of pesticides, veterinary drugs and additives in many food matrices
  • Streamlined procedure with few simple steps, lowering potential errors
  • Minimal organic solvent usage, safer for analysts and environment-friendly.
  • Saving time and cost significantly

Related Methods

  • NCI Hi-Purit provides QuEChERS kits dedicated for most common methods:
  • BS EN 15662:2018 Foods of plant origin-Multimethod for the determination of pesticide residues using GC-and LC-based analysis following acetonitrile extraction/partitioning and clean-up by dispersive SPE-Modular QuEChERS-method
  • ADAC Official Method 2007.01 Pesticide Residues in Foods by Acetonitrile Extraction and Partitioning with Magnesium Sulfate.

Order Information

AOAC 2007.01 Kits
Cat# Description Sorbents Qty
COQ050020H Extraction Salts+50 mL Tube 6 g MgSO₄ 50/Box
COQ050020CH Extraction Salts+50 mL Tube + Ceramic Homogenizers 1.5 g NaOAc 50/Box
BS EN 15662: 2018 Kits
Cat# Description Sorbents Qty
COQ050010H Extraction Salts+50 mL Tube 4 g MgSO₄, 1 g NaCl 50/Box
COQ050010CH Extraction Salts+50 mL Tube + Ceramic Homogenizers 1 g Trisodium 50/Box
Original Method Kits
Cat# Description Sorbents Qty
COQ050020H Extraction Salts+50 mL Tube 4 g MgSO₄ 50/Box
COQ050020CH Extraction Salts+50 mL Tube + Ceramic Homogenizers 1 g NaCl 50/Box
Ceramic Homogenizers
Cat# Description Sorbents Qty
009903B Ceramic Homogenizers, 50 mL XXX need to fill the sorbent 50/Box

QuEChERS Premixed Extraction Salts

NCI Hi-Purit offers QuEChERS Premixed Extraction Salts are suitable for various QuEChERS Standards and used in analysis of multi-residual pesticides.

Features

  • Optimized premixed formula, more flexible operation
  • Two packages optional: easy-cut pouches and bottle
  • Package Suitable for AOAC 2007, EN 15662 standards, etc.

Order Information

ADAC 2007.01 Kits
Cat# Description Sorbents Qty
COQP6150 Extraction Pouches 6 MgSO4 50/Вак
COQS6150 Bottled Prembled Extraction Salts 1.5g NaOAc 1 kg/Bottle
BS EN 15662 2018 Kits
Cat# Description Sorbents Qty
COOP4115 Extraction Pouches 4 g Mg504, 1 g NaCl 50/Box
COQ54115 Bottled Premixed Extraction Salts 1 g Trisodium 1 kg/Bottle
Original Method Kits
Cat# Description Sorbents Qty
COQ050020H Extraction Pouches 4 g MgSO₄ 50/Box
COQ050020CH Bottled Premixed Extraction Salts 1 g NaCl 1 kg/Bottle

QuEChERS Clean-up Pouches

QuEChERS Clean-up Pouches NCI Hi-Purit offers QuEChERS Clean-up Pouches are used for analyzing multiresidual pesticides. National Chromatography Inco uses its automatic powder distribution technology to transfer the sorbent into pouches instead of tube, which is very convenient to match with customer's own 15 ml centrifuge tubes.

Features

  • Save 50% of volume, convenient for transportation, saving laboratory space
  • Easy-Cut package to open easily without any cutting tooling
  • Lower cost, suitable for mass quantity testing

Order Information

Cat# Description Sorbents Qty
COQ015031P AOAC 2007 400 mg PSA, 1200 mg MgSO₄ 100/Box
COQ015033P AOAC 2007 400 mg PSA, 400 mg C18, 1200 mg MgSO₄ 100/Box
COQ015036P AOAC 2007 400 mg PSA, 400 mg GCB, 1200 mg MgSO₄ 100/Box
COQ015040P AOAC 2007 400 mg PSA, 400 mg C18, 400 mg GCB, 1200 mg MgSO₄ 100/Box
COQ015025P AOAC 2007 150 mg C18, 900 mg MgSO₄ 100/Box
COQ015035P AOAC 200 400 mg PSA, 400 mg C18, 45 mg GCB, 1200 mg MgSO₄ 100/Box
COQ015027P EN 15662 150 mg PSA, 900 mg MgSO₄ 100/Box
COQ015032P EN 15662 150 mg PSA, 150 mg C18, 900 mg MgSO₄ 100/Box
COQ015020P EN 15662 150 mg PSA, 15 mg GCB, 900 mg MgSO₄ 100/Box
COQ015024P EN 15662 150 mg PSA, 45 mg GCB, 900 mg MgSO₄ 100/Box

QuEChERS Clean-Up kits

NCI HI-Purit offers QuEChERS Clean-up Kits Includes sorbents and MgSO4, 2 mL and 15 mL centrifuge tubes, ceramic homogenizers are optional as well The sorbents include PSA/C18-EC/GCB, etc. PSA is to remove the fatty acids and organic acids from samples. C18-EC is to remove the fats from samples, GCB Is to remove the pigment from samples choose appropriate sorbent combination with different samples

Features

  • Supply 2 ml or 15 ml purification tubes
  • Suitable for AOAC 2007, EN 15662 standards, etc

Order Information

BS EN 15662: 2018 KITS
Cat No Size Application Sorbents Qty
5200.126 2 ml General Food and vegetables. 25mg PSA, 150mg Mg504 100/Box
5200.127 15ml 150mg, PSA, 500mg MgSO4 50/Box
5200.128 2ml General Fruits and Vegetables with fats and waxe 25mg PSA,25mg C18,150mg Mg504 100/Box
5200.129 15ml 150mg PSA, 150mg (18,900mg Mg504 50/Box
5200.131 2ml General fruits and vegetables with pigment 25mg PSA, 2.5mg GCB, 150mg MgSO4 100/Box
5200.132 15ml 150mg PSA, 15mg GCB, 900mg MgSO4 50/Box
5200.133 2ml General fruits and vegetables with highly pigment 25mg PSA, 7.5mg GCB, 150mg M504 100/Box
5200.134 15ml 150mg PSA, 45mg GCB, 900mg Mg504 50/Box
AO AC 2007.01 KITS
Cat No Size Application Sorbents Qty
5100.405 2 ml General Food and vegetables 50mg P5A, 150mg MgSO4 100/Box
5100.406 15ml 400mg, PSA, 1200mg Mg504 50/Box
5100.407 2ml General Fruits and Vegetables with fats and waxe 50mg PSA, 50mg C18,150mg Mg504 100/Box
5100.408 15ml 400mg PSA, 400mg C18,1200mg MgSO4 50/Box
5100.409 2ml General fruits and vegetables with pigment 50mg PSA, 50mg GCB, 150mg MgSO4 100/Box
5100.411 15ml 400mg PSA, 400mg GCB, 1200mg MgSO4 50/Box
5100.412 2ml General Fruits and Vegetables with Pigments and fats 50mg PSA, 50mg C18, 50mg GCB 150mg MgSO4 100/Box
5100.413 15ml 400mg PSA, 400mg C18, 400mg GCB 1200mg MgSO4 50/Box
5100.414 2ml Other food methods 25mg C18, 150mg Mg504 100/Box
5100.415 15ml 150mg C18, 900mg MgSO4 50/Box
5100.416 2ml All food types 50mg PSA, 50mg C18, 50mg GCB 150mg MgSO4 100/Box
100.417 15ml 400mg PSA, 400mg C18, 400mg GCB 1200mg Mg504 50/Box

Multi-Tube Vortexes

NCI offers; model NC-1000 is a multi-tube vortexes with various functions and powerful shaking of sample, especially suitable for QuEChERS, as well as general sample extraction. With strong vortex and shearing force, it boosts sample dissolution and blending.

Features

  • 2500 r/min Sufficient extraction of samples Optional Intermittent pulse blending mode, suitable for viscous samples Specially designed for QuEChERS extraction and purification, ensures vortex result Matching special centrifuge tube rack, easy observation
  • The extraction efficiency of positive samples meets the requirements
Cat# Description Qty
NC-1000 National Chromatography Inco multi-tube Vortexer 1 set/Box
Description Specifications
500-2500 rpm 500-2500 rpm
Accuracy of speed #1 rpm
Amplitude 3.6 mm
Timer Range 0599 H 59 M
Interval pause timing range 1~99 s
Interval operation timing range 1~999 s
Interval operation timing range 4.5 kg
Input power AC 100~230 V, 50/60 Hz
Capacity 75 W
Size(L x W x H) 426x246 x 474 mm