甲醇中8组分苯系物溶液标准物质的研制

介绍甲醇中8组分苯系物溶液标准物质的研制过程。采用气相色谱仪(GC-FID)、电感耦合等离子体质谱仪(ICP-MS)和卡尔·费休水分仪(KF)等检测方法,结合质量平衡法对原料纯度进行验证,其纯度验证结果与证书标示值一致,并在不确定度范围内。经F检验和t检验,结果表明,采用重量-容量法制备的甲醇中8组分苯系物溶液标准物质具有良好的均匀性和稳定性,其定值结果为1000μg/mL,相对扩展不确定度为3%(k=2)。该溶液标准物质可用于环境分析中苯系物含量的测定和量值溯源。

Preparation of 8 kinds of monoaromatic hydrocarbons solution reference material in methanol

This paper introduced the developed process of mixed solution reference material for 8 kinds of monoaromatic hydrocarbons in methanol.The purity of 8 kinds of standard reagents were accurately verified via mass-balance method carried out by the analysis of gas chromatography(GC-FID),inductively coupled plasma mass spectrometry(ICP-MS)and coulometric Karl Fischer titrator(KF).The purity results were consistent with the reference value and in the range of expanded uncertainty.Investigated by the F and t examinations,this mixed reference material prepared by weighting-volumetric method was not only extraordinarily homogeneous but also quite stable.The characteristic value was 1000μg/mL with the relative expanded uncertainty of 3%(k=2).The 8 kinds of monoaromatic hydrocarbons solution reference material in methanol was utilized in view of the content analysis of monoaromatic hydrocarbons and the quantity control as well as value traceability.