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Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

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Sulphuric Acid on the Web

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Analytical Procedures - Analytical Methods
March 31, 2003

Introduction

There is often a requirement to analyze sulphuric acid for a number of elements in order to determine its quality and purity.  There are many different methods available for analyzing the acid for these trace elements.  The detection limit and accuracy of the analysis will depend on the method used, sample preparation, reagents, etc.  The following table presents suggested test methods, detection limits and accuracy for the elements most commonly measured in sulphuric acid.

Element

Test Method Detection Limit Accuracy
Aluminium Al AA (Flame) 0.1 ppm ± 10%
Antimony Sb AA (hydride/cold vapour) 0.005 ppm ± 5%
Arsenic As AA (hydride/cold vapour) 0.005 ppm ± 5%
Bismuth Bi AA (hydride/cold vapour) 0.01 ppm ± 5%
Cadmium Cd AA (Flame) 0.02 ppm ± 10%
Chlorine Cl Turbidmetric 1.0 ppm ± 5%
Chromium Cr AA (Flame) 0.05 ppm ± 10%
Cobalt Co AA (Flame) 0.02 ppm ± 10%
Copper Cu AA (Flame) 0.02 ppm ± 10%
Fluorine F Ion Selective Electrode 1.0 ppm ± 5%
Iron Fe AA (Flame) 1.0 ppm ± 5%
Lead Pb AA (Flame) 0.05 ppm ± 10%
Manganese Mn AA (Flame) 0.02 ppm ± 10%
Mercury Hg AA (hydride/cold vapour) 0.01 ppm ± 5%
Nickel Ni AA (Flame) 0.02 ppm ± 10%
Potassium K AA (Flame) 0.5 ppm ± 5%
Selenium Se AA (hydride/cold vapour) 0.005 ppm ± 5%
Silver Ag AA (Flame) 0.05 ppm ± 10%
Sodium Na AA (Flame) 0.5 ppm ± 5%
Tellurium Te AA (hydride/cold vapour) 0.01 ppm ± 5%
Tin Sn AA (Flame) 0.2 ppm ± 10%
Titanium Ti AA (Flame) 0.1 ppm ± 10%
Vanadium V AA (Flame) 0.1 ppm ± 10%
Zinc Zn AA (Flame) 0.01 ppm ± 10%
Nitrates NOx Colourimetric 1.0 ppm ± 5%
Ammonia NH4 Colourimetric 0.5 ppm ± 5%
Colour - Colourimetric 1.0 Platinum Cobalt Colour Units ± 2%
Acid Concentration - Titration < 1% ± 0.05%
Sulphur Dioxide SO2 Titration 1 ppm ± 5%

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