CAJ | 학술논문

为对半挥发性有机化合物标准物质的正确使用提供指导,选用美国ChemSevice公司生产的PPH-10RPM"甲醇中16种多环芳烃混合标准物质",将其分装于2 mL聚四氟乙烯衬盖棕色螺口样品瓶中于-18℃避光贮存,采用气相色谱-火焰离子化检测器方法测试各个特性量值随贮存时间的变化.结果表明,标准物质各个特性量测量的标准偏差在0.3～4.0 μg/mL,最大相对标准偏差为3.92%.在置信度为95%时,χ~2-检验表明测试结果的精密度适当,评价的测试方法可行;标准物质各特性量值在(100.0±7.2) μg/mL时,测量的偏差不显著.分装后的标准物质至多可保存80天,具体的保存期限还应结合标准物质所剩的有效期确定.
위대반휘발성유궤화합물표준물질적정학사용제공지도,선용미국ChemSevice공사생산적PPH-10RPM"갑순중16충다배방경혼합표준물질",장기분장우2 mL취사불을희츤개종색라구양품병중우-18℃피광저존,채용기상색보-화염리자화검측기방법측시각개특성량치수저존시간적변화.결과표명,표준물질각개특성량측량적표준편차재0.3～4.0 μg/mL,최대상대표준편차위3.92%.재치신도위95%시,χ~2-검험표명측시결과적정밀도괄당,평개적측시방법가행;표준물질각특성량치재(100.0±7.2) μg/mL시,측량적편차불현저.분장후적표준물질지다가보존80천,구체적보존기한환응결합표준물질소잉적유효기학정.
In order to offer guidance on correctly using certified reference materials (CRMs) of 16 polycyclic aromatic compounds (PAHs) in methanol (named PPH-10RPM) manufactured by ChemService Co. Ltd in application of PAHs analysis, stability of CRMs in opened stocks was tested by gas chromatography with a flame ionization detector (GC/FID). The CRM was transferred into 2 mL brown bottles equipped with Teflon-lined screw-caps, stored with minimal headspace and protected from light at storage time was determined. The results showed that the standard deviations of all the property values ranged from 0.3～4.0 μg/mL and the maximum relative standard deviation was 3.92%. In the 95% confidence level, the chi-squared test (χ~2-test) showed that precision of the measurements was acceptable and indicated the evaluation method was feasible and reliable. In addition, the measurement deviation was not significant when the range of property values of the CRMs were within (100.0±7.2) μg/mL. The experiment data also showed that the preservation period of the CRMs for opened stocks was up to 80 days and the period of validity of the CRMs should be considered.