Determination of Potash concentration in Bronze bath

Analyzing the potash value in a galvanic bath ensures proper conductivity, pH balance, and plating quality. Potassium hydroxide (KOH) maintains the alkaline environment, enhancing metal deposition, bath stability, and corrosion resistance. A low value reduces conductivity and efficiency, while excess KOH can cause burning or dull coatings. Monitoring the potash value is essential on the production line in order to provide real-time correction and prevent defects on the finished product.

Method

Test type: End Point.

Testing time: immediate reading.

Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR GalvanLab® and 3 tests for CDR GalvanLab® Junior.

Passo 1
Step 1/8
Place the test tubes containing reagent R1 in one of the incubation cells and let them warm for at least 5 minutes.
Passo 2
Step 2/8
Gently shake the cuvette 2-3 times.
Passo 3
Step 3/8
Place the cuvette in the cell marked with the blue light and press READ to perform the photometric reading.
Passo 4
Step 4/8
Collect 50 µL of sample with a pipette. Use a new tip for each test to prevent contamination from previous samples.
Passo 5
Step 5/8
Carefully clean the outside of the pipette tip with blotting paper, avoiding contact between the extremity of the tip and the paper.
Passo 6
Step 6/8
Place the sample in the cuvette. Keeping the tip immersed in reagent, press and release the piston of the pipette several times.
Passo 7
Step 7/8
Gently shake the cuvette 2-3 times.
Passo 8
Step 8/8
Place the cuvette in the cell marked with the blue light and press READ to perform the photometric reading.
13%

Sample treatment

The sample can be used as is.

Principle of the test

The potash value is determined by the reaction between hydroxide ions in the galvanic bath and a chromogen. The optical intensity is proportional to the concentration of hydroxide ions in the analyzed sample.

Calibration curve

The calibration curve was obtained by correlating the CDR method with the reference method.

Potash Analysis in Bronze Baths: Calibration Curve of the CDR GalvanLab® instrument with the reference method.

Reagent test Kits

Code *400070: 100 test
Code *400075: 10 test
The reagents have a shelf-life of 12 months

Measuring range

AnalysesMeasuring rangeResolutionRepeatability
Potash bronze bath5 - 20 g/L0.100 g/L0.2 g/L

The chemical analysis instruments for electroplating baths

CDR GalvanLab®

  • Complete analysis panel, supplied already configured
  • Up to 16 determinations simultaneously
  • Possibility of carrying out analyses of the same sample
  • Integrated printer
  • Full connections (LAN - USB - Bluetooth barcode/QR code reader)

CDR GalvanLab® Jr

  • Partial analysis panel, customisable configuration
  • Up to 3 determinations simultaneously
  • Wireless connection to external printer
  • USB connections
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