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iCheck Chroma 3

iCheck Chroma 3 measures vitamin A in oil

iCheck Chroma 3™ is a state-of-the-art portable photometer for measuring vitamin A concentration in edible oil. The iCheck is specifically developed and equipped with innovative technology to enable technically sophisticated measurement of absorption. iCheck Chroma™ 3 displays vitamin A concentration in mg RE/kg and IU/g.

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iCheck iLab Content

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iCheck Test Kit Content

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iCheck Chroma 3 measures vitamin A in oil

  • Analyte: Vitamin A (retinol) as retinyl palmitate

  • Sample: Refined edible oils: palm, soy, cottonseed, sunflower, corn, peanut, rapeseed, coconut, rice bran

  • Sample preparation: If the oil is solid, warm it up to a maximum of 50°C to make it liquid

  • Sample volume per analysis: 0.1 mL (100μL)

  • Concentration range: >3.0 ppm (mg/kg), samples above 30.0 ppm must be diluted in refined unfortified oil



  • Analytical method: Photometric determination of retinol concentration using colorimetric Carr-Price reaction combined with compensation for matrix effect

  • Units displayed: mg RE/kg and IU/g; RE – retinol equivalents, IU – international units

  • Linear range: 3.00 – 30.00 mg RE/kg (10.00 – 100.00 IU/g)

  • Calibration: Factory set (standards included for control)

  • Time per analysis: < 2 min

  • Environment: 20 –30°C, no direct sunlight

  • Accuracy at 95% confidence interval at 25°C: <±30%

  • Method comparison: High-performance liquid chromatography (HPLC)

  • User training: 1 day training

  • Use: Laboratory and field

  • Data output: Sample #, Batch #, Result, Date, Time (in transferred data)

  • Connectivity and data: Results are stored in the device and transferred to a PC via USB

  • Power source: NiMH rechargeable batteries included; AA 1.2 or 1.5V

  • Warranty: 2 years

  • Device weight: 0.45 kg

  • Device dimensions: 11 x 4 x 20 cm (W x H x L)


  • Content: 100 reagent vials; 100 syringes – 1.0 mL; 100 needles – 0.8mm x 16mm.

  • Chemical composition: Chloroform and antimony trichloride

  • Volume per reagent vial: 2.0 mL

  • Shelf life: 12 months at 20 – 30°C, no direct sunlight, upright

  • Dimension of test kit: 26 x 14.5 x 16.5 cm

  • Disposal instructions: Hazardous waste

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