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dc.contributor.authorBunnaranurak, Napapornen_US
dc.contributor.authorนภาพร บุญนรานุรักษ์en_US
dc.contributor.authorTangtreamjitmun, Napaen_US
dc.contributor.authorนภา ตั้งเตรียมจิตมั่นen_US
dc.date.accessioned2022-04-23T03:42:23Z
dc.date.available2022-04-23T03:42:23Z
dc.date.issued2022-04-23
dc.identifier.issn2651-1096
dc.identifier.urihttp://repository.rmutp.ac.th/handle/123456789/3793
dc.descriptionวารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 15, ฉบับที่ 2 (ก.ค.-ธ.ค. 2564), หน้า 14-23en_US
dc.description.abstractDirect thermal decomposition mercury analysis is an efficient technique for determination of mercury in facial whitening creams. The analysis can be performed without any sample preparation. The samples can be weighed and placed directly into the analyzer. Thus, there is no chemical waste produced in sample preparation. The time and energy used in sample digestion are saved as well. The calibration curve between mercury absorbance in terms of peak height and weight of standard mercury in the range of 0.1-10 ng was created. The calibration curve was linear followed the equation y=2.003x10-2X– 5.14x10-4 with coefficient of determination (R2) 0.9991. The precision in term of repeatability were 14% and 5.9% rsd (n=3) at 1.2 and 868 µg kg-1, respectively. The recoveries were between 88-110%. The detection limit (LOD) was 0.1 µg kg-1 (3sd/m, n=10). The amount of mercury detected in 12 whitening cream samples sold in Chonburi province during the year 2019 were within the safety standard permitted in general cosmetics under the notification of the Ministry of Public, except two samples were over the permitted standard.en_US
dc.description.sponsorshipRajamangala University of Technology Phra Nakhonen_US
dc.language.isothen_US
dc.subjectMercuryen_US
dc.subjectปรอทen_US
dc.subjectThermal analysisen_US
dc.subjectการวิเคราะห์ทางความร้อนen_US
dc.subjectCreamen_US
dc.subjectครีมen_US
dc.subjectDecayen_US
dc.subjectการสลายตัวen_US
dc.subjectMercury contenten_US
dc.subjectปริมาณปรอทen_US
dc.titleDetermination of mercury contents in facial whitening cream samples by direct thermal decomposition mercury analyzeren_US
dc.title.alternativeการหาปริมาณปรอทในตัวอย่างครีมหน้าขาวโดยเทคนิคการวิเคราะห์ปรอทโดยตรงด้วยการสลายตัวด้วยความร้อนen_US
dc.typeJournal Articlesen_US
dc.contributor.emailauthornapa@buu.ac.then_US
dc.contributor.emailauthorarit@rmutp.ac.then_US


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