The tests used in standards for evaluating smoke alarms were developed back in the 1980s. However, despite changes in building materials since then, smoke alarms remain reliable, says Chagger: "They still respond to all the main fires we get today."
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三是提升实验室分析要求。在实验室测定环节新增了空白试验要求，对方法检出限和定量限的确定原则、精密度、校正曲线绘制、准确度评价以及平行样分析等核心质控指标的评价内容和要求进行了系统性的变更与细化。