NIST RM 8631a Medium Test Dust (MTD)中等矿物测试粉尘(1um-50um)

NIST RM 8631a Medium Test Dust (MTD)

These SRM and RM materials are intended for use in calibrating the response of particle sizing instrumentation, including optical counters, in accordance with National Fluid Power Association(NFPA) and ISO standard methods (NFPA/T2.9.6 R2-1998, ISO/FDIS 11171, ISO/FDIS 12103) for determining particle contamination in oils.

SRM 2806a is certified for particle concentration and projected area diameter. It consists of a polydisperse, irregularly-shaped mineral dust suspended in 5606 hydraulic fluid.

RMs 8631 and 8632 are mineral test dusts of medium and ultrafine particle size and can be used to prepare suspensions in other types of oils.

NOTE: The same lot of medium test dust was used to produce SRM 2806 and RM 8631, and is a derivative of Arizona Road Dust.

本产品隶属于NIST（National Institute of Standards and Technology，即：美国国家标准与技术研究院）的产品分类 301.5 - Particle Count Materials (powder and suspension forms) （ 即：颗粒计数材料(粉尘及悬浮液) ）；

这类产品中的SRM（Standard Reference Material，即：标准参考物质）和RM（Reference Material，即：参考物质）是用于颗粒大小测量的仪器，包括光学计数器的校准。这是根据美国国家流体动力协会（NFPA）和ISO标准方法中（NFPA/T2.9.6 R2-1998、ISO/FDIS 11171、ISO/FDIS 12103）关于确定油品中的颗粒杂质而制备的。

SRM 2806a 是被认证的杂质颗粒浓度和投影面积的标准悬浮液。它有一个多分散的，不规则性的矿物粉尘悬浮于MIL H 5606航空液压油。

RM 8631a和8632是中等和超细颗粒尺寸的矿物测试粉尘，可用于制备在其他类型的油品悬浮液。

注：同一批次的试验粉尘被用于生产SRM 2806和8631，这是亚利桑那道路试验粉尘的衍生物。