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北京石油化工学院2026年研究生招生接收调剂公告
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orgchem563

木虫 (正式写手)

[求助] 元素分析求助 难道这个检测是和气相联用?

药典检测方法如下:
Carbonic acid: 12.5 percent to 14.5 percent.
Test sample. Place 7.00 mg of the substance to be examined in a tin capsule. Seal the capsule.
Reference sample. Place 7.00 mg of almagate CRS in a tin capsule. Seal the capsule.
Introduce separately the test sample and the reference sample into a combustion chamber of a CHN analyser purged with helium for chromatography R and maintained at a temperature of 1020 °C. Simultaneously, introduce oxygen R at a pressure of 40 kPa and a flow rate of 20 mL/min and allow complete combustion of the sample. Sweep the combustion gases through a reduction reactor and separate the gases formed by gas chromatography ( 2.2.28 ).
Column:
— size: l =2m,Ø=4mm;
— stationary phase: ethylvinylbenzene-divinylbenzene copolymer R1.
Carrier gas: helium for chromatography R.
Flow rate:100 mL/min.
Temperature:
— column: 65 °C;
— detector: 190 °C.

求助
一般都没有打听到元素和气相联用的
是不是我搞错了
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orgchem563

木虫 (正式写手)

就没有人了么?
是不是用总有机碳测定仪
2楼2013-03-25 13:05:21
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