Instrument state instability caused "arsenic door" into the reliabilit
After nearly a month of waiting, "arsenic door" mystery in the first week of New Year's answers. Yesterday (6), Hainan Province, the Bureau released the latest findings, mainly for technical reasons that caused the beginning of inspection failures, citing Hainan Province Inspection & Quarantine Technology Center of the letter, saying Apparatus Aging, state instability in the deviation of the test results, instructed Trade and Industry Bureau, Haikou, and related businesses to apologize to consumers.
Conclusions published, public outcry, was questioned: "the distortion caused by aging equipment, so the previous test results, how to believe?" It was also commented: "You can blame the program, you can blame the machine, but the final damage or the government's credibility. "
Yesterday afternoon, the Hainan Provincial Office of Industry and Commerce provided a "Hainan Provincial Administration for Industry and Commerce and Industry Bureau, Haikou, and Uni-sampling Nongfushangquan investigation of the incident briefing drink" (hereinafter referred to as "notification"). "Informed" that the January 4, 2010, Hainan Province, Inspection & Quarantine Technology Center to the Hainan Provincial Industrial and Commercial Bureau sent a letter to apologize. "Alert" to invoke the letter said, an error early screening revealed the main reasons: "First, the total arsenic for atomic fluorescence spectrometry detection sensitivity decreases. The instrument used for almost nine years, after initial inspection on the day of the instrument Draw the standard curve analysis, instrument status was unstable, especially in low standard deviations big curve on the test results caused some impact. Second, pretreatment is not strictly according to standard methods of sample and set the volume. test personnel to shorten the testing time, reduce the sample and sample weight, and increased sample dilution, which in the case of unstable state apparatus, and more big discrepancy in the value of the probability of detection. "
Links: About Instrumentation Reliability Domestic equipment Meter And automation system reliability and stability of the large gap with foreign products. The reliability issue has shaken the metallurgy, electric power, petrochemical and other key industries in the domestic product of confidence and major technical equipment in the country localization work, instrumentation and automation systems to promote domestic production of the slowest. Has greatly influenced Equipment manufacturing Industry technical standards and product quality. Stability and reliability problems have restricted the development of China's industrial instrumentation and technological innovation as a serious obstacle.
Reliability is a comprehensive work, the reliability of the work required from the system point of view, the product life cycle, the maximum exclusion, control and unreliable elements, to maximize the detection of unreliable elements caused by defects, in order of least cost, most save time to achieve the established objectives of the operation reliability. It involves the effectiveness of product performance, functional safety, service life, maintenance, adaptability to environment, as well as the production life cycle cost and other aspects. Reliability requires systematic theoretical research, require long-term data accumulation, requires careful experimental demonstration and a wide range of research and analysis.
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