ASTM D4735-09
Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography

Standard No.

ASTM D4735-09

Release Date

2009

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4735-09(2014)

Latest

ASTM D4735-19

Scope

This test method is suitable for setting specifications on benzene and for use as an internal quality control tool where benzene is either produced or used in a manufacturing process.

This test method was found applicable for determining thiophene in refined benzene conforming to the specifications described in Specification D2359 and may be applicable toward other grades of benzene if the user has taken the necessary precautions as described in the text.

This test method was developed as an alternative technique to Test Method D1685.

1.1 This test method covers the determination of thiophene in refined benzene in the range from 0.80 to 1.80 mg/kg for the Flame Photometric Detector (FPD), and from 0.14 to 2.61 mg/kg for the Pulsed Flame Photometric Detector (PFPD). For the PFPD, the minimum level of quantitation (LOQ) is 0.14 mg/kg and the minimum level of detection (LOD) is 0.04 mg/kg, as described in ASTM Research Report RR: D16-1038. The range of the test method may be extended by modifying the sample injection volume, split ratios, calibration range, or sample dilution with thiophene-free solvent.

1.2 This test method has been found applicable to benzene characteristic of the type described in Specifications D2359 and D4734 and may be applicable to other types or grades of benzene only after the user has demonstrated that the procedure can completely resolve thiophene from the other organic contaminants contained in the sample.

1.3 The following applies to all specified limits in this test method: for purposes of determining conformance to applicable specification using this test method, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit in accordance with the rounding-off method of Practice E29.

1.4 The values stated in SI units are to be regarded as standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.

ASTM D4735-09 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D1685 Standard Test Method for Traces of Thiophene in Benzene by Spectrophotometry
• ASTM D2359 Standard Specification for Refined Benzene-535
• ASTM D3437 Standard Practice for Sampling and Handling Liquid Cyclic Products
• ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
• ASTM D4177 Standard Practice for Automatic Sampling of Petroleum and Petroleum Products
• ASTM D4307 Standard Practice for Preparation of Liquid Blends for Use as Analytical Standards
• ASTM D4734 Standard Specification for Refined Benzene-545
• ASTM D6809 Standard Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
• ASTM E1510 Standard Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E260 Standard Practice for Packed Column Gas Chromatography
• ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E355 Standard Practice for Gas Chromatography Terms and Relationships*， 2024-04-19 Update
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E840 Standard Practice for Using Flame Photometric Detectors in Gas Chromatography

ASTM D4735-09 history

• 2019 ASTM D4735-19 Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
• 2015 ASTM D4735-15 Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
• 2009 ASTM D4735-09(2014) Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
• 2009 ASTM D4735-09 Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
• 2002 ASTM D4735-02 Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
• 1996 ASTM D4735-96(2000) Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
• 2000 ASTM D4735-96 Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography