Quality control of mixed acids in the semiconductor industry

Speed, ease-of-use, and simplicity – this is what NIRS stands out for

Faster and more cost-efficient quality control of acid mixtures with NIRS

Near-infrared spectroscopy (NIRS) is a non-destructive method that allows for the reliable detection of complex acid mixtures at the push of a button. The measurement is easy and secure, and the acid concentrations are determined in just 30 seconds.

> Learn how to simplify mixed acid analyses and achieve significant cost savings

Which acid mixture do you analyze?

Acid baths, analysis of acid mixtures in the semiconductor industry

Near-infreared spectroscopy (NIRS) is the ideal method to measure mixed acid solutions consisting of two to four different acids. Whether you are interested in the quantification of sulfuric, phosphoric, nitric, hydrofluoric, hydrochloric, or acetic acid – NIRS will do the job.

> Learn how to analyze sulfuric, phosphoric, nitric, hydrofluoric, hydrochloric, or acetic acid with NIRS

Get in touch for a live demo

Metrohm offers local demonstrations

The DS2500 Liquid Analyzer with the starter calibration for mixed acids analysis is the ideal solution for the quality control of your acid mixtures. Our local Metrohm Application Specialists will happily discuss your application needs with you. Boost your efficiency now and

> Contact us for a live demo


The benefits of near-infrared spectroscopy (NIRS) in quality control (QC)

What is NIRS?

Near-infrared spectroscopy (NIRS) is a spectroscopic technique focusing on the near-infrared region of the electromagnetic spectrum, which ranges from 780 to 2,500 nm. Together with Raman spectroscopy and mid-infrared spectroscopy (mostly FT-IR), NIRS belongs to the groups of vibrational spectroscopy methods. The first NIR spectrometers for chemical analysis and industrial applications were developed in the 1980s. There exist two main types of NIR analyzers: Fourier Transform based (FT-NIR) and dispersive NIR (scanning) spectrometers. The advantage of our dispersive spectrometers with a monochromator and holographic grating is that they combine visible (Vis) and near-infrared (NIR) spectroscopy and are capable of qualitative (identification and qualification) and quantitative analysis of multiple parameters with just one measurement.

What are the benefits of NIRS over wet-chemical techniques?

Near-infrared spectroscopy (NIRS) offers several advantages over traditional, wet-chemical techniques such as thermometric titration:

  • NIRS does not require any preparation steps and is fast, providing accurate results in less than a minute.
  • NIRS can determine multiple parameters in a single run.
  • NIRS is a non-destructive method, meaning that the samples are not destroyed or tampered with chemically during analysis and can thus be reused.
  • NIR spectrometers can be operated by non-specialists, knowledge of chemical analysis and chemical reactions is not required.
  • NIR spectrometers are easy to use, which means that staff training is fast.
  • NIRS does not require potentially toxic solvents and reagents, thus it is a green and environmentally friendly method.

Most users report significant time savings and cost savings when performing their analyses with NIRS instead of with wet-chemical techniques (i.e., thermometric titration). After investing in an NIR analyzer, the break-even point is generally reached quickly and the return-on-investment calculations (ROI) show a very positive outcome.