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Material Database:

INCT-CF-3 Corn Flour
Type Certified reference material
Producer Institute of Nuclear Chemistry and Technology (INCT/ICHTJ)
Status Available
Material Powder
Reference INCT-CF-3
Catalog (Web) http://www.ichtj.waw.pl/ichtj/market/m-eng/dep_08/certmat.
htm
 
Description

 The material was prepared from corn grown in Poland according to Polish standard PN-A-74205:1997. The material was sieved through the 250 µm nylon sieves and stored in a polyethylene (PE) bag. Approximately  50 kg of sieved corn flour was collected. Examination by optical microscopy revealed that Martin’s diameter of  over 98% of particles was below 25 µm. The whole lot of corn flour was then homogenized by mixing for 20  hours in a 110 dm3 PE drum rotated in three directions. Preliminary homogeneity testing by XRF method and  final checking of homogeneity by NAA after distribution of the material into containers revealed, that it is  sufficiently homogeneous at least for a sample size >= 100 mg. In order to assure the long-term stability,  all containers with INCT-CF-3 were sterilized by electron beam radiation. Long-term stability was checked by  analyzing concentrations of selected elements in the material stored in the air-conditioned room at 20°C.  Short-term stability was examined by the determination of concentrations of the selected elements in the  bottle stored in the CO2 incubator at 37°C. The shelf life of INCT-CF-3 has been established to be 31  December 2015. The material was certified on the basis of a worldwide interlaboratory comparison, in which  92 laboratories from 19 countries. Analytical uncertainties and stability uncertainties were quantified to arrive  at combined uncertainties of the certified values

Package
50 g

Parameter
Analyte   Boron  
Specification   total boron  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   1,65 ± 0,33  

Analyte   Magnesium  
Specification   total magnesium  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   1066 ± 37  

Analyte   Phosphorous  
Specification   total phosphorous  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   2831 ± 97  

Analyte   Sulfur  
Specification   total sulfur (total sulphur)  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   919 ± 121  

Analyte   Chlorine  
Specification   total chlorine  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   397 ± 33  

Analyte   Potassium  
Specification   total potassium  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   3157 ± 119  

Analyte   Scandium  
Specification   total scandium  
Parameter   Certified value  
Unit   ng/g (ppb)  
Result   2.13 ± 0.32  

Analyte   Manganese  
Specification   total manganese  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   4.98 ± 0.22  

Analyte   Iron  
Specification   total iron  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   32.0 ± 1.4  

Analyte   Nickel  
Specification   total nickel  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   0.383 ± 0.039  

Analyte   Copper  
Specification   total copper  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   1,63 ± 0,13  

Analyte   Zinc  
Specification   total zinc  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   20.09 ± 0.76  

Analyte   Bromine  
Specification   total bromine  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   0,388 ± 0,046  

Analyte   Rubidium  
Specification   total rubidium  
Parameter   Certified value  
Unit   mg/kg (ppm)  
Result   0.912 ± 0.042  

Analyte   Molybdenum  
Specification   total molybdenum  
Parameter   Certified value  
Unit   ng/g (ppb)  
Result   152 ± 12  

Analyte   Lanthanum  
Specification   total lanthanum  
Parameter   Certified value  
Unit   ng/g (ppb)  
Result   6.6 ± 1.2  








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