供应美国标准局NIST用于分光光度测定的光学标准物质
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The optical SRMs for spectrophotometry are certified transfer standards that fall into three general categories: transmittance, wavelength, and stray radiant energy; each of which addresses a specific instrumental parameter of an absorption spectrometer that must be in control for accurate optical transmittance measurements. To obtain optimum verification results, each SRM must be used within the specified range of conditions for which it is intended. /用于分光光度测定的光学SRM是经过认证的传输标准，分为三大类：透射率、波长和杂散辐射能；其中每一项都涉及吸收光谱仪的特定仪器参数，必须对其进行控制，以便进行准确的光学透射率测量。为了获得最佳验证结果，每个SRM必须在其预期条件的规定范围内使用。
SRM 931h Liquid Absorbance Standard for Ultraviolet and Visible Spectrophotometry 紫外可见分光光度法液体吸光度标准 set (12)
SRM 935a Potassium Dichromate (Ultraviolet Absorbance Standard) 重铬酸钾（紫外线吸收标准） 15 g
SRM 1921b Infrared Transmission Wavelength/Wavenumber Standard 红外传输波长/波数标准 1 card
SRM 1928 Infrared Specular High Reflectance Standard (Nominal Diameter 51 mm) 红外镜面反射高反射率标准（标称直径51 mm） disk
SRM 1929 Infrared Specular High Reflectance Standard (Nominal Diameter 25 mm) 红外镜面高反射率标准（标称直径25 mm） disk
SRM 2031c Metal-on-Fused-Silica Neutral Density Filters (250 nm to 635 nm) 熔融石英中性密度过滤器上的金属（250 nm至635 nm） set (3) 美国标准局NIST用于分光光度测定的光学标准物质
SRM 2034 Holmium Oxide Solution Wavelength Standard (240 nm to 650 nm) 氧化钬溶液波长标准（240 nm至650 nm） Cuvette
SRM 2035b Ultraviolet-Visible-Near-Infrared Wavelength/Wavenumber Transmission Standard 紫外-可见-近红外波长/波数传输标准 each
SRM 2036 Near Infrared Wavelength/Wavenumber Reflection Standard 近红外波长/波数反射标准 each
SRM 2082 Pathlength Absorbance Standards for Microliter Volume Spectrophotometers 微升体积分光光度计的光程长度吸光度标准 set of 3 vials