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Ò©µä¼ì²â·½·¨ÈçÏ£º 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 ¡ãC. 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: ¡ª size: l =2m,Ø=4mm; ¡ª stationary phase: ethylvinylbenzene-divinylbenzene copolymer R1. Carrier gas: helium for chromatography R. Flow rate:100 mL/min. Temperature: ¡ª column: 65 ¡ãC; ¡ª detector: 190 ¡ãC. ÇóÖú Ò»°ã¶¼Ã»ÓдòÌýµ½ÔªËØºÍÆøÏàÁªÓÃµÄ ÊDz»ÊÇÎÒ¸ã´íÁË |
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orgchem563
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- ×¢²á: 2007-04-24
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