R.I. 4753

A Colorimetric Method for the Determination of Thiophene in Synthesis Gas

Wainwright, H.W.
Lambert, G.I.

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Contents

Page

Introduction

1

Summary and conclusions

2

Acknowledgments

2

Discussion

2

Experimental investigations

4

Age of isatin-acid solution

4

Effect of an oxidizing agent

5

Effect of temperature

6

Interfering substances

7

Carbon disulfide

7

Ethyl mercaptan

7

Unsaturated hydrocarbons

8

Applicability to synthesis gas

9

Procedure

9

Reagents

9

Color measurement

9

Calibration curves

10

Determination of an unknown sample

10