Survey of Primary Aromatic Amines Originating from Azo Dyes in Commercial Textile Products in Direct Contact with Skin and in Commercial Leather Products in Japan

Kawakami, Tsuyoshi; Isama, Kazuo; Nishimura, Takuya

doi:10.5985/jec.22.197

Cited by 3 publications

(1 citation statement)

References 6 publications

(8 reference statements)

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“…Chapter 1 -Introduction and literature review ………………………………………………………………………………………………………………………………………………………………… of o-toluidine of 430 mg/kg, benzidine (31 mg/kg), and 3,3′-dimethylbenzidine (40 mg/kg) in leather products 185 .…”

Section: Detection Of Mps and Nps And Other Pollutants On Textilesmentioning

confidence: 99%

Identification of Micro- and Submicron (Nano) Plastics in Water Sources and the Impact of COVID-19 on Plastic Pollution

Delgado Gallardo

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One of the most significant environmental issues that our society may deal with this century could be plastics. The world's water bodies, as well as land and air, are becoming more and more contaminated by plastic due to the ongoing and expanding manufacturing of these synthetic materials, as well as the lack of an effective strategy for managing plastic waste.The fact that plastics break down into smaller particles (micro and nanoplastics) by action of environmental physical and chemical reactions, and do not degrade biologically in a reasonable time, is a cause of concern as plastics are believed to cause harm in animals, plants and humans.To identify the types of plastics prevalent in aquatic habitats, a number of procedures have been developed, from sampling to identification. After a water body has been sampled using nets, pumps, or other tools, depending on the type of sample taken, it is usually necessary to treat the samples for separation and purification. The next stage is to employ analytical techniques to identify the synthetic contaminants. The most common approaches are microscopy, spectroscopy, and thermal analysis. This thesis gives an overview of where in the environment microplastics (MPs) and nanoplastics (NPs) can be found and summarizes the most important technologies applied to analyse the importance of plastics as a contaminant in water bodies. The development of standardised analytical procedures is still necessary as most of them are not suitable for the identification of particles below 50 μm due to resolution limitations. The preparation and analysis of samples are usually timeconsuming factors that shall be considered. Particularly for MP and NP analysis in aqueous samples, thermal analysis methods based on sample degradation are generally not considered to be the most effective approach. Nevertheless, Pyrolysis -Gas Chromatography Time-of-Flight Mass Spectrometry (Py-GCToFMS) is used in this thesis to propose a novel approach as due to its unique detection abilities, and with a novel filtration methodology for collection, it enables the identification of tiny particle sizes (>0.1 μm) in water samples. PTFE membranes were selected to filter the liquid samples using a glass filtration system. This way, the synthetic particles will be deposited on the membranes and will allow the study and analysis of the precipitated material. PTFE is a readily available, reasonably priced, and adaptable product that makes sample preparation quick and simple.The three plastics under study-polypropylene (PP), polystyrene (PS), and polyvinyl chloride (PVC)-can be identified from complex samples at trace levels thanks to the employment of these widely used membranes and the identification of various and specific

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Section: Detection Of Mps and Nps And Other Pollutants On Textilesmentioning

confidence: 99%

Identification of Micro- and Submicron (Nano) Plastics in Water Sources and the Impact of COVID-19 on Plastic Pollution

Delgado Gallardo

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GC-MS Analysis of Primary Aromatic Amines Originated From Azo Dyes in Commercial Textile or Leather Products Using Helium Alternative Carrier Gases

Tahara,

Kawakami,

Ikarashi

2023

Journal of AOAC International

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Background In recent years, due to the global shortage of helium gas, the development of gas chromatography analytical methods using alternative to helium carrier gases is necessary. Objective The objective of this study was to examine the applicability of hydrogen and nitrogen as alternative carrier gases using the test method for azo compounds in the Act on Control of Household Products Containing Harmful Substances of Japan. Methods The gas chromatograph mass spectrometer (GC-MS) analytical method using hydrogen and nitrogen as alternative carrier gases was compared with a method using helium for 26 primary aromatic amines originated from azo dyes. Results When hydrogen and nitrogen were used as carrier gases under the same conditions used during analysis using helium (same column, gas flow rate, oven temperature conditions, etc.), sufficient peak separation of 26 primary aromatic amines was obtained. The sensitivities of the methods using helium and hydrogen were comparable, whereas the sensitivity was lower when nitrogen was used, with the detection limits ranging from 1/220 to 1/25. However, all carrier gases achieved quantification at concentrations below the standard value (30 μg/g) of the Act on Control of Household Products Containing Harmful Substances, and the results were in agreement with the standard value for the target product. Conclusion Our results indicated that hydrogen or nitrogen can be used as alternative carrier gases to helium for GC-MS analysis of azo compounds producing specific aromatic amines. Highlights Using hydrogen or nitrogen as an alternative carrier gas to helium, azo compounds could be quantified with excellent accuracy.

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Regulation of Hazardous Substances in Household Products and Cases of Health Damage Caused by Textile Products

Kawakami¹

2022

Sen-i Gakkaishi

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Survey of Primary Aromatic Amines Originating from Azo Dyes in Commercial Textile Products in Direct Contact with Skin and in Commercial Leather Products in Japan

Cited by 3 publications

References 6 publications

Identification of Micro- and Submicron (Nano) Plastics in Water Sources and the Impact of COVID-19 on Plastic Pollution

Identification of Micro- and Submicron (Nano) Plastics in Water Sources and the Impact of COVID-19 on Plastic Pollution

GC-MS Analysis of Primary Aromatic Amines Originated From Azo Dyes in Commercial Textile or Leather Products Using Helium Alternative Carrier Gases

Regulation of Hazardous Substances in Household Products and Cases of Health Damage Caused by Textile Products

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