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ASTM D4590

ASTM D4590 – Standard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS (α–Methylstyrene) by Spectrophotometry

Description:

Significance and Use

5.1 This test method is suitable for determining the quantity of TBC inhibitor, both for the protection against polymerization while in transit and storage, and for internal quality control.

Scope

1.1 This test method is applicable to the determination of residual 4-tertiary-butylcatechol (TBC) in styrene monomer or AMS in the 1 mg/kg to 100 mg/kg range.

1.2 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29. The limit of detection is 0.2 mg/kg while the limit of quantitation is 0.8 mg/kg based on the ILS data in Table 1.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

Related Test Methods

ASTM D4950

ASTM D495

ASTM D4951

ASTM D4950

ASTM D495

ASTM D4948

ASTM D4946

ASTM D4943

ASTM D4940

ASTM D4935

ASTM D4929

ASTM D4928

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