供应美国NIST临床检验材料24R，25-二羟基维生素D3校准溶液SRM 2971
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Purpose: This Standard Reference Material (SRM) is intended for use in calibration of instruments and techniques used for the determination of 24R,25-Dihydroxyvitamin D3 [24R,25(OH)2D3]. 美国NIST临床检验材料
Description: A unit of SRM 2971 consists of five two-milliliter ampoules of ethanolic solution. Each ampoule contains approximately 1 mL of solution.
Certified Values: The certified value for 24R,25(OH)2D3 is provided in Table 1. A NIST certified value is a value for which NIST has the highest confidence in accuracy in that all known or suspected sources of bias have been investigated or taken into account [1]. The certified value for 24R,25(OH)2D3 is based on results from the isotope dilution liquid chromatography tandem mass spectrometry (ID-LC-MS/MS) procedure [2] and gravimetric
preparation performed at NIST. The NIST ID-LC-MS/MS method is recognized as a higher-order reference measurement procedure by the Joint Committee for Traceability in Laboratory Medicine (JCTLM) . 24R，25-二羟基维生素D3校准溶液SRM 2971
用途：本标准参考物质（SRM）用于仪器和技术的校准用于测定24R，25-二羟基维生素D3[24R，25（OH）2D3]。
说明：SRM 2971的一个单元由五个两毫升安瓿的乙醇溶液组成。每个安瓿含有大约1毫升溶液。
认证值：24R，25（OH）2D3的认证值见表1。NIST认证值是指NIST对准确性具有最高信心的值，因为所有已知或怀疑的偏差源都已被调查或考虑[1]。24R，25（OH）2D3的认证值基于同位素稀释液相色谱-串联质谱法（ID-LC-MS/MS）程序[2]和重量分析的结果
在NIST进行的准备工作。NIST ID-LC-MS/MS方法被实验室医学可追溯性联合委员会（JCTLM）认定为一种高阶参考测量程序。
SRM 2971 – 24R,25-Dihydroxyvitamin D3 Calibration Solution