Nickel Test Paper


Nickel Products | CTL Scientific Supply

Nickel

Precise rapid tests for water and waste water samples

In natural waters, Nickel is present only rarely and only in low concentrations. Of greater importance, however, is nickel in wastewater. The nickel compounds contained in water can be present in dissolved (as nickel(II) ions or its complexes) or in insoluble form (e.g. nickel hydroxide, carbonates, sulfides and cyanides).

Nickel is used for metal finishing and for producing corrosion-resistant coatings. As an alloying metal, it is used in steel processing, constituting its main use. Addition of nickel alloys makes steel tougher, more ductile and harder. From the wash water of galvanic plants it can enter the wastewater.

Nickel can cause allergic reactions on the skin. Metal objects that come into contact with the skin are therefore regularly tested for nickel. In the past, many jewelry items (such as earrings) used to be nickel-plated. Due to the high number of people who are sensitized to nickel, fewer and fewer metal items that may come into contact with the skin are nickel-plated.

Did you know?

Nickel is the most common cause of contact allergies (nickel dermatitis).

Our Nickel Products

Product Range REF Order
Nickel test paper > 10 mg/L Ni2+ 90730
box of 200 strips $52.50  
NANOCOLOR® Nickel 4 0.10 - 7.00 mg/L Ni2+ 985071
1 pack (20 test tubes) $86.60  
QUANTOFIX® Nickel 0 · 10 · 25 · 50 · 100 · 250 · 500 · 1000 mg/L Ni2+ 91305
box of 100 strips $43.60  
VISOCOLOR® Nickel 0 · 0.1 · 0.2 · 0.3 · 0.5 · 0.7 · 0.9 · 1.2 · 1.5 mg/L Ni2+ 931040
1 kit (~150 tests) $118.75  

Reaction Basis

Colorimetric and photometric determination of nickel ions using dimethylglyoxime (diacetyldioxime).

Nickel Reaction Figure

Sample preservation

After adjusting the pH value to 1–2 with nitric acid, the sample can be preserved for storage for up to 1 month (storage vessel: PE or glass bottle).

Tips & tricks

  • Decomposition
    • Complexed nickel is not or only partially covered analytically and must be decomposed before determination. For total nickel determination, decomposition with NANOCOLOR® NanOx Metal (REF 918 978) or with the decomposition kit (REF 918 08) must be performed prior to analysis.
  • Sea water suitability
    • Almost all VISOCOLOR® and NANOCOLOR® nickel tests are suitable for sea water analysis; some require dilution (1+9). For more information, please refer to the respective instruction leaflet.
  • pH
    • The pH value which is stated in the instruction leaflets for the sample solution must be complied with.
  • Interferences
    • Calcium interferes with the detection. For disturbance suppression, use reagent for lime precipitation (up to 20 g/L Ca2+, REF 918 939).
    • Further interfering ions are listed in the package inserts.
  • Turbidity
    • Turbid solutions must be filtered prior to the determination of dissolved nickel; turbidity leads to incorrect results: For coarsely dispersed turbidities, use qualitative filter paper (e.g. MN 615), for moderately dispersed turbidities, use glass-fiber paper (e.g. MN 85/70 BF) or or membrane filtration set GF/PET 0.45 μm, for finely dispersed turbidities, use membrane filtration kit 0.45 μm or GF/PET 0.45 μm.
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