Pollution characteristics and exposure risks of PAEs in PM2.5 of indoor environment on university campus was written by Wu, Qianlan;Lei, Jingzheng;Wang, Lijun. And the article was included in Huanjing Kexue Yanjiu in 2021.HPLC of Formula: 84-61-7 This article mentions the following:
In order to determine the pollution characteristics of PM2.5 and PM2.5-bound phthalate esters (PAEs) and the risk of teachers and students exposed to PM2.5-bound PAEs in campus indoor environment, 52 indoor PM2.5 samples were collected at six sampling sites on the Chang閳ョ瀽n campus of Shaanxi Normal University in autumn and winter. The concentration of 22 PAEs was determined by gas chromatog.-mass spectrometer, the composition and spatial and temporal distribution of PAEs were studied, and the health risks of teachers and students exposed to PM2.5-bound PAEs were evaluated. The results showed that: (1) The total concentration of the 22 PAEs at different sampling sites ranged from 237 to 413 娓璯/m3, and the sum of 6 priority PAEs ranged from 4.81 to 7.47 娓璯/m3. The predominant PAEs of indoor PM2.5 were diisobutyl phthalate, dicyclohexyl phthalate, and diisononyl phthalate, which were non-priority PAEs and much higher than those of 6 priority PAEs. (2) The detection rate of 6 priority PAEs was different at different sampling sites. Six priority PAEs were detected in library and classrooms, four priority PAEs were detected in student apartments, and only three priority PAEs were detected in family area. (3) Seasonal changes impacted the concentration of indoor PM2.5 and PM2.5-bound PAEs. The average concentration of indoor PM2.5 in winter (58.3 娓璯/m3) was higher than that in autumn (55.4 娓璯/m3). The concentration of 6 priority PAEs in Dec. was in the range of 0.250-3.86 娓璯/m3, which was significantly higher than that in autumn months. (4) The source anal. results of principal component anal. and cluster anal. showed that PAEs of campus indoor PM2.5 were mainly related to the emission of indoor decoration materials, the use of ink, cosmetics and personal care products of students, the application of plasticizers, and the release of coatings. (5) The health risk assessment results showed that the non-carcinogenic risk of 6 priority PAEs was low, and the carcinogenic risk of benzyl Bu phthalate and di(2-ethylhexyl) phthalate was below 1鑴?0-6 and could be ignored. The research showed that the pollution of PM2.5 and the concentration and composition of PM2.5-bound PAEs varied in different indoor environments on campus. The non-carcinogenic risk of teachers and students exposed to six priority PAEs of indoor PM2.5 was relatively low, and the carcinogenic risk was negligible. However, much attention should be paid to the pollution and risk of non-priority PAEs in the environment. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7HPLC of Formula: 84-61-7).
Dicyclohexyl phthalate (cas: 84-61-7) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.HPLC of Formula: 84-61-7
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics