被動式採樣器性能評估準則之探討

Proposed Protocol for the Evaluation of Passive Monitors

為了令使用者有信心利用被動式採樣器測量工作場所空氣中的氣體和蒸氣，提出此準則，做為評估國內可得之各種擴散式採樣器的指引。本準則認為被動式採樣器的性能測驗應考慮：分析的回收；採樣率及採樣容量；逆擴散；表面風速；樣本貯存的安定性；準確度與精密度；空白值、完整性及有效期；以及濃度、暴露時間、濕度、干擾物、溫度、採樣器方向性等的影響。同時建議於實驗室完成各項性能測驗之後，可進行現場的測驗。每項性能測驗均包括實驗設計及結果說明。實驗設計期待以合理且經濟的實驗取得最多的資訊。結果的說明則以一般瞭解的統計處理為基礎。

A protocol for assessing the performance of passive samplers was devised for gaining the user’s confidence on using them in monitoring gases and vapors in workplaces. This protocol was initially drawn up as a guideline for evaluating all kinds of passive samplers available in this country. The characteristics identified as critical to the performance of passive samplers included: recovery; sampling rate and sampling capacity; reverse diffusion; face velocity; storage stability; accuracy and precision; blank, integrity and shelf life; and the effects of concentration, exposure, time, humidity, interference, temperature and orientation. Observing behavior in the field was also suggested after the laboratory test concerning with the characteristics were completed. Experimental design and data interpretation were established for each characteristic. Experimental design was intended to obtain a maximum information from a reasonable experimentation. Data interpretation was based on statistical treatment.