Pesticide Analysis in Food by MS

Cairns, Thomas; Baldwin, Richard A.

doi:10.1021/ac00113a730

Cited by 7 publications

(2 citation statements)

References 3 publications

(3 reference statements)

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“…That is why the aim of numerous investigations is to determine the concentration of various toxic substances such as aromatic hydrocarbons, pesticides, biphenyl, sodium ortho -phenol-phenolate, thiabendazole, methyl bromide, ethyl bromide, etc., in citrus fruits [3,4,5,6,7,8,9,10]. Modern analytical chemistry can help in the preconcentration and determination of VOCs and other substances isolated from various matrices.…”

Section: Introductionmentioning

confidence: 99%

Study of VOC distribution in citrus fruits by chromatographic analysis

Ligor¹,

Buszewski²

2003

Analytical and Bioanalytical Chemistry

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The contamination of various parts of citrus fruits by toluene (a representative of volatile organic compounds-VOCs) was analyzed. The model of contamination distribution, based on investigations of the sorption and accumulation of toluene in particular parts of citrus fruits was considered. Solvent extraction of components from fruit parts (waxy layer, cuticle, and pulp) was applied. The extracts were analyzed by gas chromatography. The sorption time profiles for such citrus fruits as kumquats and mandarins were determined by plotting the extracted mass, or the relationship C/C(0), versus the sorption time of toluene. After the sorption process the highest concentration of toluene was observed in the flavedo, where the oil glands of kumquats and mandarins are located. The data obtained prove that the high dissolution of aromatic hydrocarbons results from the presence of essential oils in the oil glands. The diffusion coefficients of toluene for the cuticle and pulp of kumquats were also calculated. The results of model investigations were compared with the actual concentration of toluene in kumquats, citrons, mandarins and oranges from outdoor stands and orchards.

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Section: Introductionmentioning

confidence: 99%

Study of VOC distribution in citrus fruits by chromatographic analysis

Ligor¹,

Buszewski²

2003

Analytical and Bioanalytical Chemistry

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“…Indeed, over the years a number of pesticides have been banned (e.g., dichlorodiphenyltrichloroethane, DDT), while the amount of those allowed is closely regulated typically at 1 part-per-million (micrograms per milliliter) and below. 40,41 Nevertheless, over 5% of the 7 million tons of fruit imported by the United States exceeds these tolerance levels, 42,43 since many nations follow less stringent regulations. This imported fruit represents nearly half of the US consumption, and takes on an added concern, since a substantial percentage is used for baby food.…”

Section: Rationale For Using Sers For Trace Analysis In Foodsmentioning

confidence: 99%

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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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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Pesticide Analysis in Food by MS

Cited by 7 publications

References 3 publications

Study of VOC distribution in citrus fruits by chromatographic analysis

Study of VOC distribution in citrus fruits by chromatographic analysis

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

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

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