GB/T 12688.3-2011
Test method of styrene for industrial use—Part 3:Determination of content of polymer (English Version)

Standard No.: GB/T 12688.3-2011
Language: Chinese, Available in English version
Release Date: 2011
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 12688.3-2011
Replace: GB/T 12688.3-1990

Scope: This part specifies the method for the determination of polymer content in styrene for industrial use. The spectrophotometric method in this section is applicable to the determination of styrene samples with a polymer content ranging from 1 mg/kg to 15 mg/kg. If the polymer content of the sample is greater than 15mg/kg, it should be properly diluted before the measurement. The visual method in this section is applicable to the determination of styrene samples with a polymer content (mass fraction) not greater than 1.0%. When the polymer content (mass fraction) of the sample is greater than 1.0%, it should be properly diluted before the measurement. This section does not apply to the detection of dimers and trimers in industrial styrene. This section is not intended to explain the safety issues related to its use, the user is responsible for taking appropriate safety and health measures, and to ensure compliance with relevant national regulations.

GB/T 12688.3-2011 Referenced Document

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 12688.3-2011 Test method of styrene for industrial use—Part 3:Determination of content of polymer
1990 GB/T 12688.3-1990 Styrene for industrial use--Determination of content of polymer--Photometric method