Water content variation of p-n-heptylphenol reference material

Hanari, Nobuyasu; Iwasawa, Ryoko; Otsuka, Satoko; Fujiki, Naomi; Matsumoto, Ayako; Ihara, Toshihide; Ishikawa, Keiichiro; Yarita, Takashi

doi:10.1007/s00769-010-0714-5

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…Analyses of the 3 APs (NP, 1.2 mg to 3.5 mg; HP, 1.4 mg to 5.7 mg; DCP, 1.5 mg to 3.2 mg; in principle n=3 in each of three selected vials or ampoules on each AP) were performed with the NIST SRMs. Sampling information was described in the ESM and in the publication [8].…”

Section: Freezing Point Depression Methodsmentioning

confidence: 99%

“…Candidate CRMs were analyzed (in principle n=3 in each of three selected vials or ampoules on each AP) after verification using a standard solution of water. Sample information was described in the ESM and in the publication [8].…”

Section: Water Content Analysesmentioning

confidence: 99%

“…Conditions of this KFT are described elsewhere [8]. Aliquots of candidate CRMs (NP, 28 mg to 56 mg; OP, 63 mg to 158 mg; BP, 42 mg to 234 mg; HP, 56 mg to 505 mg; DCP, 109 mg to 149 mg) were introduced into the KFT vessel following instrument equilibration.…”

Section: Water Content Analysesmentioning

confidence: 99%

“…The between-vial (ampoule) homogeneity of each candidate CRM was estimated by determining the peak area fractions in at least four sub-samples taken from 7 or 10 vials or ampoules (7 for NP; 10 for others) randomly selected from the total. Exceptionally, the between-ampoule homogeneity of HP was also estimated as relative values based on the water mass fraction in at least four sub-samples taken from 7 ampoules randomly selected from the total because certain trend between water content and ampoule number was observed [8]. Technically invalid results were removed, and then analysis of variance (ANOVA) of the data was performed [22].…”

Section: Homogeneity and Stability Assessmentsmentioning

confidence: 99%

“…The National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST) have issued some CRMs of high-purity organics such as APs [7,8], phthalates [9], and volatile organic compounds [10] as NMIJ CRMs based on the JCSS. As for APs, we previously adopted freezing point depression method using a differential scanning calorimeter (DSC) to evaluate purity because this calorimetric method is regarded as one of the primary methods of measurement and obtained values can be considered to be traceable to the International System of Units (SI) [11].…”

Section: Introductionmentioning

confidence: 99%

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Certification of reference materials for the determination of alkylphenols

et al. 2015

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Certified reference materials (CRMs) are playing an increasingly important role in national and international standardizing activities. In Japan, primary standard solutions for analyses of endocrine disrupters are supplied under the national standards dissemination system named the Japan Calibration Service System (JCSS). For the traceability on reference materials used for preparation of the primary standard solutions based on the JCSS, the National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST) has developed and certified high-purity reference materials of alkylphenols as NMIJ CRMs, such as 4-n-nonylphenol, 4-tert-octylphenol, 4-n-heptylphenol, 4-tert-butylphenol, and 2,4-dichlorophenol. Thereafter, it is essential to determine the alkylphenols by using these solutions based on the JCSS for environmental monitoring and risk assessments because analytical values obtained by using the solutions can ensure the reliability and traceability of the chemical analyses.

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Section: Freezing Point Depression Methodsmentioning

confidence: 99%

Section: Water Content Analysesmentioning

confidence: 99%

Section: Water Content Analysesmentioning

confidence: 99%

Section: Homogeneity and Stability Assessmentsmentioning

confidence: 99%