GB/T 12688.8-2011
Test method of styrene for industrial use—Part 8:Determination of content of inhibitor(p-tert-butylcatechol)—Spectrophotometric method

Standard No.: GB/T 12688.8-2011
Language: Chinese
Release Date: 2011
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Lastest: GB/T 12688.8-2011
Replace: GB/T 12688.8-1998

Scope: This part specifies the method for the determination of p-tert-butylcatechol (TBC) content in styrene for industrial use. This section applies to the determination of TBC content in industrial styrene, the scope of application is 1mg/kg ~ 100mg/kg. Any other compound contained in styrene that can generate color with sodium hydroxide alcohol solution will interfere with the determination. However, if the compound and its concentration in the sample are known, it may be compensated by adding this compound when preparing the standard solution. This section is not intended to address all safety issues related to its use. It is the user's responsibility to establish appropriate safety and health measures to ensure compliance with the relevant national laws and regulations. CAUTION: Styrene is flammable. Exothermic polymerization will occur in contact with peroxides, mineral acids and aluminum trichloride, etc. High concentrations of liquid styrene and its vapors are irritating to the eyes and respiratory system.

GB/T 3723 Sampling of chemical products for industrial use--Safety in sampling
GB/T 6680 General rules for sampling liquid chemical products
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

2011 GB/T 12688.8-2011 Test method of styrene for industrial use—Part 8:Determination of content of inhibitor(p-tert-butylcatechol)—Spectrophotometric method
1998 GB/T 12688.8-1998 Styrene for industrial use--Determination of content of inhibitor (p-tert-butylcatechol)--Spectrophotometric method

GB/T 12688.8-2011Test method of styrene for industrial use—Part 8:Determination of content of inhibitor(p-tert-butylcatechol)—Spectrophotometric method