液体闪烁计数器法测定生物基泡沫中生物质含量

Determination of bio-based content in bio-based foams by liquid scintillation counting

分别采用液体闪烁计数器和加速质谱仪对3块不同生物质含量的生物基泡沫进行测试。发现以二氧化碳吸收作前处理的液体闪烁计数器法的测定结果中生物质百分含量分别为13.41%、19.51%和28.05%;加速器质谱法测定的结果为14.12%、20.39%和27.61%,两种方法的相对偏差为5.00%、4.30%和1.59%。结果表明:以二氧化碳吸收作前处理的液体闪烁计数器法能对生物基泡沫塑料进行鉴定,并能很好的测试出生物质的含量。

Liquid scintillation counter （LSC） and accelerator mass spectrometry （AMS） were used to determine the bio-based content of three bio-based foams. It was found that the bio-based contents of foams tested by LSC were 13.41%, 19.51% and 28.05% respectively, while the results determined by AMS were 14.12%, 20.39% and 27.61% respectively. The relative deviations were 5.00%, 4.30% and 1. 59% for the two above methods. The results indicated that the LSC method based on the preparation method of CO2 absorption could well identify bio-based foams and determine the bio-based content.