sample recovery

After removing ether in the extract in a rotary evaporator, a transparent, yellow liquid with special fragrance was obtained, which contains the volatile components of the sample. The recovery was about 6.5%.

用旋转蒸发器除去乙醚后即得到含有试样中挥发组分的透明的黄色液体，收得率为6.5%，应用GC/MS法对黄色液体的组分进行定性和定量分析。

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Conclusion The optimal test condition for determining TVOC in air has been presented in this paper. The precision and sample recovery rate will meet the requirement of indoor air quality standard annex A Indoor Air Monitoring Technology.

结论该方法提出了测定TVOC样品的最佳测试条件，其精密度和样品回收率均符合室内空气质量标准附录A《室内空气监测技术》中的要求。

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Analysis for the effects of sample length on the picosecond recovery time measurements

饱和吸收体恢复时间测量中样品厚度影响的分析

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A New Placer Drilling Method& the Center Sample Recovery Method

砂矿钻探新方法&中心取样（CSR）钻探法

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This method has been applied to the direct determination of DHB isomers in water sample, and the recovery was from 97% to 104%.

L-1.将此方法用于模拟废水中苯二酚的检测，回收率为97%～104%。

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Vehicle accelerating test, the highest vehicle speed test and brake energy recovery test were done on sample vehicle.

通过整车进行车辆加速性能、最高车速和制动能量回收试验。

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Recovery of silver from silver manganite with chloride roasting cyanide leaching process are studied. The effects of sodium chloride addition, particle size of ore sample, roasting time, roasting temperature on recovery rare of silver are examined.

研究了以氯化焙烧-氰化浸出工艺从银锰矿中回收银，考察了氯化钠加入量、矿石粒度、焙烧时间、焙烧温度对银浸出率的影响。

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The absolute rate of adding sample recovery of three concentrations ( 1, 5. 25 μ g/ ml) of 1 were between 78.7-98.6% which can meet needs of the pharmacokinetic and tissue distribution experiments;

考察的甲醇+乙酸乙酯法提取的不同组织样品中的1在1、5、25μg/ml三种浓度下绝对加样回收率在78.7-98.6%之间，可满足血浆药物浓度-时间曲线实验和组织分布实验；

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