Pesticides - Multiresidue Analysis in Various Food Matrices

Method for the determination of 346 Residual Pesticides in Milk using LCMS-8045 and GCMS-TQ8040 NX

Method for the determination of 346 Residual Pesticides in Milk using LCMS-8045 and GCMS-TQ8040 NX PDF Thumbnail

Milk is an important food in the diet, especially for infants and children. The presence of any contamination in milk is a common food safety concern. Hence great efforts have been taken throughout the dairy industry to ensure the safety of milk. One of the main classes of contaminants in milk is pesticides, which can come from animals ingesting contaminated feed or water. The maximum residue limits for pesticides in milk are often much lower than for general fruits and vegetables. Therefore, the analysis of pesticides in milk requires a sample preparation method for better matrix removal and analytical instrument methods for increased sensitivity. The aim of this study is to develop a simple and efficient workflow for determining a wide range of pesticides that are broadly controlled in milk worldwide. Based on these requirements, Shimadzu Application Development Center (ADC) has developed and validated a simple, sensitive and high throughput multiclass, multiresidue method for the determination of 346 pesticides in milk by using LCMS-8045 and GCMS-TQ8040 NX. The multi-residue extraction was performed with modified QuEChERS method for simultaneous quantification of 223 pesticides by LC-MS/MS and 167 pesticides by GC-MS/MS. Out of these, 44 pesticides were common and analyzed by both the techniques.

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Multiresidue pesticides analysis in Curcumin color additive powder using GCMS-TQ8040 NX and LCMS-8050

Multiresidue pesticides analysis in Curcumin color additive powder using GCMS-TQ8040 NX and LCMS-8050 PDF Thumbnail

Color additives are dyes, pigments, or other substances that can impart color when added or applied to a food, drug, cosmetic, or the human body. They can be found in a range of consumer products—from cough syrup and eyeliner to contact lenses and cereal. The food color curcumin (turmeric yellow) is obtained by solvent extraction of turmeric, i.e., the ground rhizomes of Curcuma longa L., with purification of the resultant extract by crystallization. In India, it has been used as a food preservative and as a spice in curry dishes. Hence, considering the heavy use of pesticides in their cultivation, it is important to analyze these plant-based color additives for the presence of residual pesticides. This note shows validation data of the Multi-residue analysis method in complex matrix such as curcumin powder. The analysis was performed using modified QuEChERS and triple quadrupole gas chromatography (GC-MS/MS) and liquid chromatography (LC-MS/MS) system.

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Analysis of residual pesticides in Carrot Oleoresin using GCMS-TQ8040 NX and LCMS-8045

Analysis of residual pesticides in Carrot Oleoresin using GCMS-TQ8040 NX and LCMS-8045 PDF Thumbnail

Carrot is often contaminated with pesticide residues, due to the application of various chemicals for the control of ectoparasites, insects and pests. Carrot is used to prepare or extract natural color additives in the form of oleoresin. Oleoresin is produced by solvent extraction of carrot powder or dehydrated carrot using a suitable organic solvent. Alternatively, the oleoresin can be recovered by steam distillation followed by solvent extraction. During the extraction process, the pesticide residues get concentrated in these oleoresins. The carrot oleoresins (Figure 1) are used as color additives in food products, cosmetics, nutraceutical and pharma drugs. Hence quantitation of residual pesticides in carrot oleoresin becomes very important. As the oleoresin is a complex matrix for extraction, it is required to develop a rugged, sensitive and easy method for residual pesticide analysis. Shimadzu Application Development Center (ADC), India has developed a highly sensitive method for simultaneous quantification of multiple pesticides in complex matrix of carrot oleoresin using modified QuEChERS and triple quadrupole gas chromatography (GC-MS/MS) and liquid chromatography (LC-MS/MS) system.

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Method for the determination of 313 Residual Pesticides in Black tea using LCMS-8045 and GCMS-TQ8040 NX

Method for the determination of 313 Residual Pesticides in Black tea using LCMS-8045 and GCMS-TQ8040 NX PDF Thumbnail

Tea is one of the most refreshing and aromatic beverage consumed globally. To improve quality and quantity of tea production, broad spectrum of pesticides is frequently applied on its crop. Therefore, Maximum Residual Limits (MRL) are listed by various international regulatory bodies for wide variety of pesticides. Thus, increasing the importance of analytical method for determination of a range of pesticides present in tea. Based on these requirements, Shimadzu Application Development Center (ADC) has developed and validated a simple, sensitive and high throughput multiclass, multiresidue method for the determination of 313 pesticides in black tea by using LCMS-8045 and GCMS-TQ8040 NX. The multi-residue extraction was performed with modified QuEChERS method for simultaneous quantification of 203 pesticides by LC-MS/MS and 131 pesticides by GC-MS/MS. Out of these, 21 pesticides were common and analyzed by both the techniques.

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