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Concentrated acids in etching solutions

One of the uses of ion chromatography is to check the content of an electroplating bath. For this, the anion concentrations of the acids and acid mixtures used are determined.

Procedure:
The unique combination of Metrohm Inline Dilution Technique and a minimum injection volume (0.25 μL) makes possible, for example, fully automatic analysis of  concentrated acid mixtures such as an etching solution containing 10% HF, 30% HNO3, 30% H2SO4 and 13% H3PO4. Read more

Application example:

 Etching solution

Etching solution diluted inline 1:100, column: Metrosep A Supp 5 - 150/4.0; eluent: 3.2 mmol/L Na2CO3+ 1.0 mmol/L NaHCO3, 0.7 mL/min; sample volume: 0.25 μL (internal loop)