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Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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Titrating is just intelligent dosing. With the Titrando, dosing is carried out by a Dosino and Dosing Unit mounted directly onto the reagent bottle. This means that dosing does not occupy more space than the footprint of the reagent bottle.
The Dosino is equipped with state-of-the-art mechatronics. The Dosing Unit can be replaced in no time. It is intelligent, as it is equipped with a data chip containing all the necessary data about the reagent and the Dosing Unit that is required for the titration. This information is available to the Titrando.
Each Dosing Unit has a serial and a cylinder number and is supplied with an individual certificate.
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AB-344 Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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This bulletin deals with the automated determination of mixtures of HNO3, HF and H2SiF6 in the range of approximately 200-600 g/L HNO3, 50-160 g/L HF, and 0-185 g/L H2SiF6 using thermometric titration.Etch acid mixtures containing HNO3, HF and H2SiF6 from the etching of silicon substrates can be analyzed in a sequence of two determinations using the 859 Titrotherm. The first determination involves a direct titration with standard c(NaOH) = 2 mol/L, followed by a back titration with c(HCl) = 2 mol/L. This determination yields the H2SiF6 content plus a value for the combined (HNO3+HF) contents. The second determination consists of a titration with c(Al3+) = 0.5 mol/L to determine the HF content. For freshly made up mixtures of HNO3 and HF containing no H2SiF6, a linked two-titration sequence is employed. Results from the two determinations are used by tiamoTM to yield individual results for HNO3, HF and H2SiF6.
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Download EN
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AB-344 Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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AB-344 Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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AB-344 Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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AB-344 Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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AB-344 Automated analysis of etch acid mixtures using the 859 Titrotherm and the 814 USB Sample Processor
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Evonik Goldschmidt
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Dr. Matthias Weibels and his team analyze hundreds of batches every week …
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