Alcohol Pretreatment to Eliminate the Interference of Micro Additive Particles in the Identification of Microplastics Using Raman Spectroscopy

Li, Dunzhu; Sheerin, Emmet D.; Shi, Yunhong; Xiao, Liwen; Yang, Luming; Boland, John J.; Wang, Jing Jing

doi:10.1021/acs.est.2c01551

Cited by 33 publications

(20 citation statements)

References 67 publications

(154 reference statements)

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“…It is noteworthy that, after "background" subtraction, the cos θ values corresponding to imidacloprid concentrations of 0.001 and 0.01 μM substantially increased from 0.64 and 0.73 to 0.78 and 0.88, respectively (Figure 5b). These values exceed the commonly adopted threshold value of 0.7 for matching an unknown sample with a standard in the Raman library, 41 confirming the ability of this method to identify imidacloprid at 0.001 μM.…”

Section: ■ Introductionsupporting

confidence: 65%

Rapid Prescreening of Trace Imidacloprid in Drinking Water via Concentration-Dependent Surface-Enhanced Raman Spectroscopic Patterns

Cai,

Cho,

Wei

2023

ACS EST Eng.

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Imidacloprid, the most extensively utilized neonicotinoid insecticide in crop fields, is increasingly being detected in drinking water sources, thereby posing significant risks to human health. Unfortunately, conventional methods for imidacloprid analysis in drinking water, such as liquid chromatography−tandem mass spectrometry (LC-MS/MS), are prohibitively expensive and timeconsuming, rendering them unsuitable for large-scale monitoring. The study described herein explores a surface-enhanced Raman spectroscopic (SERS) method as a prescreening tool for imidacloprid detection and quantification in drinking water supplies. It was observed that the SERS patterns of imidacloprid on gold nanoparticle (AuNP) surfaces exhibited variations corresponding to its decreasing concentration, which was harnessed for imidacloprid quantification without reliance on internal standards. Furthermore, the study identified and mitigated the primary interferences encountered in drinking water sourced from groundwater and surface water through a process known as "background" subtraction. This approach yielded an exceptional 100% reliability in detecting imidacloprid at a concentration of 0.01 μM in 30 independently collected samples, with up to ten measurements conducted for each sample. By employing a customized data processing pipeline comprising techniques such as principal component analysis, SERS barcoding, and vector angle calculation, the limit of detection was further refined to 0.001 μM. This innovative analytical method, characterized by its rapidity, affordability, and lack of internal standards, represents the first successful application relying solely on SERS patterns for chemical quantification. It holds immense potential for enabling high-throughput prescreening of imidacloprid in drinking water supplies.

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Section: ■ Introductionsupporting

confidence: 65%

Rapid Prescreening of Trace Imidacloprid in Drinking Water via Concentration-Dependent Surface-Enhanced Raman Spectroscopic Patterns

Cai,

Cho,

Wei

2023

ACS EST Eng.

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“…Moreover, in another beer study performed by Li et al. (2022) reported numbers of MPs that were 1000 times higher than those reported in other studies. However, all particles of < 5 mm in size counted with a light microscope were assumed as MPs, and no analysis was utilized to validate the result.…”

Section: Comparative Analysis Of the Inconsistencies In The Mp Litera...mentioning

confidence: 67%

Assessing the inconsistency of microplastic measurements in foods and beverages

Canga,

Gowen,

2024

Comp Rev Food Sci Food Safe

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The widespread occurrence of microplastics (MPs) in the food chain has gained substantial recognition as a pressing concern, highlighting the inevitability of human exposure through ingestion of foodborne MPs, coupled with the release of MPs from plastic packaging. However, there are notable disparities in the reported numbers of MPs in foods and beverages, warranting a thorough investigation into the factors contributing to these discrepancies. Table salt is one of the major sources of MPs, and there was an approximately hundred‐fold difference between the reviewed studies that reported the highest and lowest number of MPs. In addition, more noticeable discrepancies were discovered between studies on MPs released from teabags. One study reported that approximately 15 billion MPs were released into a cup of tea from a single teabag, whereas another research paper found only approximately 106.3 ± 14.6 MP/teabag after brewing. This comprehensive review focuses on the inconsistencies observed across studies examining MPs, shedding light on the plausible factors underlying these variations. Furthermore, the review outlines areas in analytical procedures that require enhancement and offers recommendations to promote accuracy and standardization in future research efforts, such as employing analytical methods capable of confirming the presence of MPs, using appropriate filter sizes, considering representative sample sizes when extrapolation is involved, and so on. By pinpointing the detection processes leading to the inconsistent results observed in MP studies, this comparative analysis will contribute to the development of reliable analytic methods for understanding the extent of microplastic contamination in the human food chain.

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“…Evidently, this unique advantage will substantially benefit the practical application of METs sensors in future. Additionally, natural polymer-based hydrogels are environmentally friendly, which can avoid potential plastic pollution [ 182 , 183 , 184 , 185 ].…”

Section: Discussionmentioning

confidence: 99%

Recent Implementations of Hydrogel-Based Microbial Electrochemical Technologies (METs) in Sensing Applications

Wang

Shi

et al. 2023

Sensors

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Hydrogel materials have been used extensively in microbial electrochemical technology (MET) and sensor development due to their high biocompatibility and low toxicity. With an increasing demand for sensors across different sectors, it is crucial to understand the current state within the sectors of hydrogel METs and sensors. Surprisingly, a systematic review examining the application of hydrogel-based METs to sensor technologies has not yet been conducted. This review aimed to identify the current research progress surrounding the incorporation of hydrogels within METs and sensors development, with a specific focus on microbial fuel cells (MFCs) and microbial electrolysis cells (MECs). The manufacturing process/cost, operational performance, analysis accuracy and stability of typical hydrogel materials in METs and sensors were summarised and analysed. The current challenges facing the technology as well as potential direction for future research were also discussed. This review will substantially promote the understanding of hydrogel materials used in METs and benefit the development of electrochemical biosensors using hydrogel-based METs.

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Alcohol Pretreatment to Eliminate the Interference of Micro Additive Particles in the Identification of Microplastics Using Raman Spectroscopy

Cited by 33 publications

References 67 publications

Rapid Prescreening of Trace Imidacloprid in Drinking Water via Concentration-Dependent Surface-Enhanced Raman Spectroscopic Patterns

Rapid Prescreening of Trace Imidacloprid in Drinking Water via Concentration-Dependent Surface-Enhanced Raman Spectroscopic Patterns

Assessing the inconsistency of microplastic measurements in foods and beverages

Recent Implementations of Hydrogel-Based Microbial Electrochemical Technologies (METs) in Sensing Applications

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