Pesticide analysis in food by MS

Cairns, Thomas; Baldwin, Richard A.

doi:10.1021/ac00113a002

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…These methods require substantial sample pretreatment and sophisticated laboratory equipment to detect, identify, and quantify a specific pesticide. This is because food represents a complex matrix, numerous pesticides are in use, and the tolerance levels are typically at 1 part-per-million (ppm) and below [7,8]. For example, a typical protocol employs a three step laboratory procedure that involves (1) extracting the pesticide from the food matrix, (2) removing interfering co-extractants to cleanup and isolate the target pesticide, and (3) detecting the pesticide.…”

Section: Introductionmentioning

confidence: 99%

Rapid extraction and detection of trace Chlorpyrifos-methyl in orange juice by surface-enhanced Raman spectroscopy

Shende

Inscore

Sengupta

et al. 2010

Sens. & Instrumen. Food Qual.

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It is estimated that 20-50% of crops are saved from infestation through the use of pesticides. However, US inspectors find that more than 4% of fruits and vegetables imported exceed concentration levels considered safe for human consumption. This represents millions of tons of food brought to market annually that cannot be inspected using current hour-long laboratory methods. In an effort to provide inspectors with a simple, fast, fieldusable analyzer and method, we have been developing a sampling device that includes surface-enhanced Raman spectroscopy (SERS) to detect, identify, and quantify pesticides below part-per-million (lg/mL) concentrations in approximately 10 min using a portable Raman analyzer. The entire method, including solvent extraction, solidphase extraction, and SERS-detection, was used to detect 50 parts-per-billion (ppb) Chlorpyrifos-methyl (CPM) artificially added to orange juice in 12 min. The same method and analyzer can be readily adapted to other pesticides and foods.

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Section: Introductionmentioning

confidence: 99%

Rapid extraction and detection of trace Chlorpyrifos-methyl in orange juice by surface-enhanced Raman spectroscopy

Shende

Inscore

Sengupta

et al. 2010

Sens. & Instrumen. Food Qual.

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“…6 There have been recent reports on pesticide analysis by means of near infrared spectroscopy, 7 fourier transform raman spectroscopy, 8 and fourier transform infrared spectroscopy. 9 Several mass spectrometry (MS)-related approaches were used in studying chemical reactions 10 involving pesticides and their byproducts.…”

Section: Spectroscopic Toolsmentioning

confidence: 99%

Detection of time‐resolved photoionization currents from pesticide‐contaminated vegetation

Kadosh

Gridin

Schechter

2001

Israel Journal of Chemistry

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Multiphoton‐ionization fast‐conductance (MPI‐FC) was directly applied for detection of photoionization currents originated from pesticide traces irradiated by UV‐laser. The principal methodology required for direct screening of pesticide traces deposited on various vegetational specimens was addressed. This approach was exemplified with 1,2,3,4,5,6‐hexachlorocyclohexane and 3‐amino‐1,2,4‐triazole, which are frequently found in agriculture‐related industries. The range of pesticide concentrations covered was from 0.001 ng/mL to 1 mg/mL, and all measurements were carried out under ambient conditions. Our target vegetation substrates were sampled from the outdoors: grass, plant, and/or tree leaves. Neither material purification nor laborious extraction routines were utilized; thus employing MPI‐FC for in situ/on‐line monitoring of pesticide‐contaminated vegetation is feasible.

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Surface‐EnhancedRaman Spectroscopy: Theory and Application to the Analysis of Chlorpyrifos in Orange Juice

Shende

Inscore

Sengupta

et al. 2001

Handbook of Vibrational Spectroscopy

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Pesticides are required to increase crop yields and volumes to feed the growing world use population. Unfortunately, many developing countries use an excess of pesticides or those which are banned. Nearly half of the fruit consumed in the USA is imported, and it is estimated that 5% exceeds acceptable pesticide levels. Less than 1% of the food is tested because methods are slow and the equipment is restricted to the laboratory. This chapter describes the use of surface‐enhanced Raman spectroscopy to perform field measurements of pesticides in fruit. Raman spectroscopy provides the necessary specificity to distinguish the numerous pesticides in use, while surface enhancement using silver nanoparticles provides the necessary part‐per‐billion sensitivity. A simple SERS‐active sampling device and field‐usable Raman analyzer were used to measure 50 ppb chlorpyrifos in orange juice within 10 min. This chapter also includes a brief description of SERS theory.

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Pesticide analysis in food by MS

Cited by 8 publications

References 12 publications

Rapid extraction and detection of trace Chlorpyrifos-methyl in orange juice by surface-enhanced Raman spectroscopy

Rapid extraction and detection of trace Chlorpyrifos-methyl in orange juice by surface-enhanced Raman spectroscopy

Detection of time‐resolved photoionization currents from pesticide‐contaminated vegetation

Surface‐EnhancedRaman Spectroscopy: Theory and Application to the Analysis of Chlorpyrifos in Orange Juice

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