Guangzhou Biaoji Packaging Equipment Co,ltd

Reference Standard | Reference Material，RM
is a substance having one or more characteristic values that are sufficiently uniform and well determined, which can be used to calibrate measuring instruments, evaluate measurement methods, or determine the characteristics of other materials. Therefore, it is used as a "measuring tool" in the analytical measurement industry.

Certified Reference Standard | Certified Reference Material，CRM

is a certified reference material whose characteristic value or values are determined by a procedure that establishes traceability and is traceable to the unit of measurement used to represent the characteristic value accurately reproduced, each of which is accompanied by the uncertainty of a given confidence level.