The practical realization of the traceability of chemical measurements standards

Research on Welding Quality Traceability Model of Offshore Platform Block Construction Process

“…The traceability process may be separated into two stages: "Follow-up Tracing" and "Problems Backtracking", which are motivated by the requirements for quality traceability management. The first stage is oriented to the manufacturing process, Cheng et al [6] stated four data traceability enabling factors based on data acquisition rate, integrity of traceability batch, clarity of product identification and timeliness and accuracy of data, and Steele [7] proposed batch-based quality management concept, which was successfully applied to traceability management business in discrete manufacturing industry for the first time by King [8]. Peng et al [9] established a traceability analysis model based on discrete-time Markov chain theory, calculate the theoretical value of system steady-state performance, and investigated the impact of the number of traceable nodes and traceable information on system performance.…”

Optimización de un método primario para la determinación de creatinina en suero humano mediante GC-IDMS

“…La trazabilidad metrológica a las unidades del sistema internacional se obtiene a partir de los métodos primarios, que representan el mayor nivel metrológico. Estos cuentan con ecuaciones e incertidumbres descritas completamente utilizando unidades del sistema internacional (King, 2005) y no tienen correcciones significativas por factores empíricos (De Bievre y Peiser, 1997). En el campo de la metrología química, la unidad aplicable es el mol y su trazabilidad se obtiene por métodos primarios como la gravimetría y la dilución isotópica con espectrometría de masas (IDMS), que cuenta con demostrada veracidad y baja incertidumbre.…”