Author Keywords: Intercomparison; Transfer standard package; Laboratory; Meter 相似文献
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The following presentation investigated the use of inductively coupled plasma atomic emission spectroscopy (ICP-AES) as a direct method of quantifying the amount of ink on a tablet. Because the ink used contained an iron oxide pigment of known composition, quantitation of the iron content could be used to measure the amount of ink transferred to the tablet.
The quantitative results obtained using ICP-AES were in agreement with calculated values for the volume of ink in the gravure roll. Tablets exposed to “double printing” were easily detected by the ICP-AES method. 相似文献
The aim was to check to what extent results obtained at the various laboratories are comparable and to reveal possible ways of improving the performances. Tests have been carried out using three transfer standard packages of three different diameters. The considered performance parameters have been: (1) agreement of results between laboratories, (2) short term stability and (3) day to day reproducibility of the reference flow.
The following main conclusions have been drawn:
• The majority of the laboratories involved in the intercomparison produced very accurate results. Despite the involvement of five independent traceability chains, 92.5% of the test results are within a band of ±0.25%.
• For most facilities the short term fluctuations are of the order of ±0.1%. Individual facilities may perform even better.
• This exercise allowed us to confirm the good results of the previous campaign and to identify some items to improve future intercomparisons.