GB/T 33817-2017: Translated English of Chinese Standard (GBT 33817-2017, GB/T33817-2017, GBT33817-2017): Method for Determination of the Carbon Content on the Inner Surface of Copper and Copper-Alloy Tube
https://www.chinesestandard.net, 2017 M11 4 - 13 pages
This Standard specifies the method for determination of carbon content in copper and copper-alloy tube or on the inner surface of tube.
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Calculation of Analysis Results
Appendix A Informative Recommended Analysis Condition
5µg of carbon adopt Method analytically pure anhydrous magnesium perchlorate arithmetic mean blank specimen blank test specimen blank value carbon and potential carbon dioxide carbon existing clean the inner clean the outer Cleaning Method Connection Schematic Diagram copper and copper-alloy copper-alloy tube cupboard at 80°C degreasing platform deionized water 4.2 exceeding situation fixture flatten following given average fume cupboard fume hood glass grinding plug glassware hard-state tube infrared Inject the oxygen inner diameter inner surface area least 30s Limit Carbon content Mannitol Standard Solution measurement results method of specimen minimum mass purity Nitric acid obtain the specimen organic compounds pipe fitting Place the specimen platform of drying Potential carbon CP quartz repeatability limit reproductivity limit residual carbon content results not exceed sealing method solution contains 5µg specimen with residual specimen with total standard solution 4.7 surface of specimen tetrachloroethylene total carbon content Total carbon CT trichloroethane tube or pipe Zhejiang