iCheck Chroma
iCheck Chroma & Chroma 3 measure Vitamin A in oil
iCheck Chroma 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 displays vitamin A concentration in mg RE/kg.
iCheck iLab Content
iCheck Chroma 3 with metal cap
USB cable for data transfer to computer
Stand for reagent vials
Battery charger and 4 rechargeable batteries
Chroma 3 Standard
User Manual and software on USB stick
iCheck Test Kit Content
Syringe
Needle
Vial
Technical Data
Technical data
SAMPLE
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
DEVICE
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
Enviroment
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)
TEST KIT
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
Optional equipment
50 mL falcons, reference samples
How it works
How it works
Scientific Publications
Scientific Publications
1. Renaud, C. Quantification of vitamin A in fortified rapeseed, groundnut and soya oils using a simple portable device: comparison to high performance liquid chromatography. International Journal for Vitamin and Nutrition Research, 2013.
2. Rohner, F. Quantification of vitamin A in palm oil using a fast and simple portable device: method validation and comparison to high-performance liquid chromatography International Journal for Vitamin and Nutrition Research, 2011.