Determination of Silver in Silver bath

Quantifying the silver content in a silver plating bath is crucial to ensuring coating quality, optimising the galvanic process and reducing costs. The correct content ensures uniform, bright and adherent deposits, avoiding defects. Monitoring the concentration allows the addition of silver salts to be adjusted, minimising waste and environmental risks, and maintaining the efficiency of the bath, prolonging its useful life.

Method

Test type: End Point.

Testing time: 2 minutes.

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 1/18
Dilute the sample to 1:100. Dilute by adding 100 ul of sample to the dilution cuvette (code *400064). The proper working procedure is described in the following slides.
Passo 2
Step 2/18
Collect 100 µL of sample with a pipette. Use a new tip for each test to prevent contamination from previous samples.
Passo 3
Step 3/18
Carefully clean the outside of the pipette tip with blotting paper, avoiding contact between the extremity of the tip and the paper.
Passo 4
Step 4/18
Place the sample in the dilution tube. Keeping the tip immersed in reagent, press and release the piston of the pipette several times.
Passo 5
Step 5/18
Gently shake the sample dilution tube.
Passo 6
Step 6/18
Place the test tubes containing reagent R1 in one of the incubation cells and let them warm for at least 5 minutes.
Passo 7
Step 7/18
Collect 10 µL of diluted sample with a pipette. Use a new tip for each test to prevent contamination from previous samples.
Passo 8
Step 8/18
Carefully clean the outside of the pipette tip with blotting paper, avoiding contact between the extremity of the tip and the paper.
Passo 9
Step 9/18
Place the R2 reagent in the cuvette. Keeping the tip immersed in reagent, press and release the piston of the pipette several times.
Passo 10
Step 10/18
Gently shake the cuvette 2-3 times.
Passo 11
Step 11/18
Place the cuvette in one of the incubation cells and start the timer by pressing the timer icon.
Passo 12
Step 12/18
Gently shake the cuvette 2-3 times.
Passo 13
Step 13/18
Select the cuvette to be read from the display. Place the cuvette in the cell marked with the blue light and press READ.
Passo 14
Step 14/18
Collect 20 µL of R2 with the pipette.
Passo 15
Step 15/18
Carefully clean the outside of the pipette tip with blotting paper, avoiding contact between the extremity of the tip and the paper.
Passo 16
Step 16/18
Place the sample in the cuvette. Keeping the tip immersed in reagent, press and release the piston of the pipette several times.
Passo 17
Step 17/18
Gently shake the cuvette 2-3 times.
Passo 18
Step 18/18
Place the cuvette in the cell marked with the blue light and press READ to perform the photometric reading.
6%

Sample treatment

The sample must be diluted.

Principle of the test

Silver content is determined by its reaction with a chromogen that develops a coloration, the optical intensity of which is proportional to the concentration of the analyte in the analyzed sample.

Calibration curve

Calibration curve was obtained by correlating the CDR method with the reference method.

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

Reagent test Kits

Code *400280: 100 test
Code *400285: 10 test
The reagents have a shelf-life of 12 months

Measuring range

AnalysesMeasuring rangeResolutionRepeatability
Silver [5-50] g/L5 - 50 g/L0.100 g/L0.3 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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