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首页> 外文期刊>International journal of environmental analytical chemistry >Certified reference material for the determination of perfiuorooctane sulfonate in acrylonitrile-butadiene-styrene resin (NMIJ CRM 8155-a)
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Certified reference material for the determination of perfiuorooctane sulfonate in acrylonitrile-butadiene-styrene resin (NMIJ CRM 8155-a)

机译：认证的参考物质，用于测定丙烯腈-丁二烯-苯乙烯树脂中的全氟辛烷磺酸盐（NMIJ CRM 8155-a）

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摘要

A certified reference material (CRM) for the determination of perfluorooctane sulfonate (PFOS) in acrylonitrile-butadiene-styrene (ABS) resin (NMIJ CRM 8155-a) has been issued by the National Metrology Institute of Japan (NMIJ). The bulk material was prepared by mixing commercial ABS resin powder and potassium PFOS and cut into square plates (20 x 20mm, 2mm thick) as the CRM. Analytical processes combined with isotope-dilution mass spectrometry and liquid chromatography/mass spectrometry were optimised and applied for characterisation. One of the approaches adopted by NMIJ for certification is that results from two or more primary methods of measurement should be used; thus, two optimised isotope-dilution mass spectrometric methods (Methods 1 and 2 with reprecipitation and with reprecipitation/solid phase extraction, respectively, were validated mutually and employed) were used to determine the certified value. Homogeneity and stability of the square plates were evaluated and their uncertainty contributions (as relative standard uncertainties) were 1.43% for inhomogeneity and 6.96% for approximately two years' instability. The certified mass fraction of linear PFOS (heptadecafluoro-1-octanesulfonic acid) in the CRM with expanded uncertainty (coverage factor k=2, approximately 95% confidence interval) was (33.1 +/- 5.0) mg kg(-1) as free acid of PFOS.
机译：日本国家计量学会（NMIJ）已发布用于测定丙烯腈-丁二烯-苯乙烯（ABS）树脂中的全氟辛烷磺酸（PFOS）的认证参考材料（CRM）（NMIJ CRM 8155-a）。通过将市售ABS树脂粉末和PFOS钾混合并切成方板（20 x 20mm，2mm厚）作为CRM来制备散装材料。优化了结合同位素稀释质谱法和液相色谱/质谱联用的分析方法，并将其用于表征。 NMIJ采取的一种认证方法是，应使用两种或两种以上主要测量方法的结果。因此，使用了两种优化的同位素稀释质谱法（分别采用再沉淀法和再沉淀/固相萃取法的方法1和2进行了相互验证并采用）来确定标准值。对方板的均质性和稳定性进行了评估，其不均匀性的不确定性贡献（作为相对标准不确定性）分别为1.43％和大约两年不稳定的6.96％。不确定性范围扩大（覆盖因子k = 2，大约95％置信区间）的CRM中的线性PFOS（七氟-1-辛烷磺酸）的认证质量分数为（33.1 +/- 5.0）mg kg（-1）全氟辛烷磺酸的酸。

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