GB/T 3392-2003#Determination of hydrocarbon impurities in propylene for industrial use Gas chromatography method # Propylene # 1-butene
SH/T 1492-2004#Determination of purity and hydrocarbon impurities of 1-butene for industrial use Gas chromatography method # 1-butene # 1-butene for industrial use
SH/T 1482-2004#Industrial isobutylene - Determination of purity and hydrocarbon impurities - Gas chromatography method # Industrial isobutylene # 1-butene
Technical requirements for manual monitoring of ozone precursor organic compounds in ambient air#Technical Requirements for Manual Monitoring of Organic Precursors of Ozone in Environmental Air (Trial) Appendix D Environmental Protection Office Monitoring Letter [2018] No. 240 # Environmental Air # 1-Butene
GB/T 9456-1988#Cross recessed hexagonal self tapping screws # Cross recessed hexagonal head self tapping screws # All parameters
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
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1. Telephone communication and confirmation of requirements
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