Tuesday, November 28, 2023
Sunday, October 6, 2024
问题:选一样品中不含的标准品,加到样品中作对照物质,对比求算待测组分含量的方法为外标法。()
Monday, July 22, 2024
Tuesday, September 13, 2022
问题:程序升温气相色谱采用双柱双气路的作用是()。A、使基线漂移得到补偿B、使色谱柱加热均匀C、防止固定液流失D、使载气流量稳定
Tuesday, September 13, 2022
问题:用内标标准曲线法进行定量,内标物与试样组分的色谱峰能分开,并尽量靠近。()
Monday, March 4, 2024
Wednesday, May 29, 2024
问题:GC6820是下列()的仪器。A、安捷伦B、瓦里安C、岛津D、戴安
Friday, September 13, 2024
Friday, December 23, 2022
Saturday, July 27, 2024
问题:色谱法分析净化气中微量H2S,COS气体时,需用()检测器检测。A、FIDB、TCDC、FPDD、ECD
Tuesday, September 13, 2022
Friday, September 13, 2024
问题:色谱法分析粗煤气中常量H2S,COS气体时,需用()检测器检测。A、FIDB、ECDC、FPDD、TCD
Tuesday, October 8, 2024
Saturday, October 12, 2024
问题:保留时间是从进样开始到某个组分的色谱峰谷的时间间隔。()
Tuesday, March 7, 2023
Friday, August 25, 2023
Saturday, October 29, 2022
Wednesday, May 29, 2024
问题:色谱法分析粗煤气中CH4、C02、CO、N2,等气体时,需用()检测器检测。A、FIDB、TCDC、FPDD、ECD
Monday, July 22, 2024
Friday, September 13, 2024