摘要
处理后的微球硅胶制成采样管，以０．３Ｌ／ｍｉｎ于现场采样３０ｍｉｎ，密封。分析时，用蒸馏水解吸硅胶上的丙烯酰胺，用紫外照射使之溴化，经乙酸乙酯提取后，用气相色谱电子捕获检测器检测。此法线性范围为０～１０．０ｍｇ／Ｌ，最低检测限为０．０１ｍｇ／Ｌ，线性良好，Ｔ＞０．９９９。批内、间精密度均良好，变异系数分别为３．５％～６．９７％和１．２６％～５．３４％，解吸效率≥９６％，２５０ｍｇ硅胶填充的采样管，其穿透容量＞０．０５ｍｇ，采集的样品至少可稳定１５天。当丙烯酰胺浓度为１．８６ｍｇ／ｍ３时，硅胶管采样效率仍为１００．０％，充分满足了现场需要。此法应用于山东四个化工厂，并同时同地用冲击式吸收管进行采样测定，结果经ｔ检验，表明两种方法无明显差异（Ｐ＞０．５００）。此改进后方法准确、方便，并可用于个体采样。
An improved method using silica-gel sampling tube to collect acrylamide (AA)vapour is developed.A glass tube(10cm X 4.5～5. 0mm) filled with 250mg silica-gel is used.The portable pump draws air for 30min at a flow of 0.3L/min. Distillced water is uscd to dcsorb the AA from samplcd silica gel. After bromination of AA and extraction,the GC method involving electron-capture detection is used. The result shows that the standard curve for the method is linear over the range 0～10mg/L of AA monomer, r>0.999 The limit of detection goes to 0. 01mg/L,The precision within and between runs are available. Coefficients of variation in the 0.2～2. 0mg/L range are from 3. 50% to 6. 97% and from 1. 26% to 5. 34%,respectively,The collection efficiency is 100% and the breakthrough capacity is above 0. 05mg.The dcsorption efficieney is above 96%, No loss has been observed during the storage of samples for 15 days at room temperature. The above method is used in 4 factories producing acrylamide polymor and compared with the generally used method. The results show no significant difference(P>0.500) between the two methods.The sillca-gel method is simple,rapid and convinient for personal sampling.
出处
《卫生研究》
CAS
CSCD
北大核心
1994年第6期335-337,共3页
Journal of Hygiene Research
基金
国家自然科学基金
