EGGS-1: Egg Powder Reference Material for Trace Metals and other Constituents

EGGS‑1 is a Reference Material prepared from Canada Grade A dried whole egg powder. Reference and information quantity values are provided in the following tables for trace metals and other constituents. Reference values are equally weighted means of results from at least two analytical methods and/or laboratories. Uncertainties are expressed as a 95% confidence interval. All values are expressed on a dry-mass basis.

Table 1: Reference values for EGGS‑1

Element Mass fraction, mg/kg
Aluminium 540 ± 86
Calcium 2480 ± 190
Chromium 0.37 ± 0.18
Cobalt 0.012 ± 0.005
Copper 2.70 ± 0.35
Iron 112 ± 16
Lead 0.061 ± 0.012
Magnesium 305 ± 27
Manganese 1.78 ± 0.38
Molybdenum 0.247 ± 0.023
Phosphorus 10 001 ± 320
Potassium 3190 ± 370
Selenium 1.39 ± 0.17
Sodium 3770 ± 340
Strontium 5.63 ± 0.46
Vanadium 0.459 ± 0.081
Zinc 67.5 ± 7.6

Table 2: Information values for EGGS‑1

Element Mass fraction, mg/kg
Antimony 0.002
Arsenic 0.01
Barium 3
Boron 0.41
Cadmium 0.005
Chlorine 5080
Iodine 1.97
Nitrogen 63 000
Sulfur 5120

Table 2 (continued): Information values for EGGS‑1

Quantity Value Unit
Ash 4.96 g/(100 g), %
Protein 39.2 g/(100 g), %
Energy content 595 kcal/(100 g)
Energy content 2488 kJ/(100 g)
Cholesterol 892 mg/(100 g)
Saturated fatty acids 17 g/(100 g), %
Monounsaturated fat 20 g/(100 g), %
polyunsaturated fat 0.6 g/(100 g), %
trans fat 1.0 g/(100 g), %
total fat 41 g/(100 g), %
Omega-6 fatty acids 0.4 g/(100 g), %

The protein concentration was calculated from the nitrogen values using a conversion factor of 6.25; subsequent calculations of carbohydrates and calories were also based on these protein concentrations. The value for energy content is the mean of the individual caloric calculations. If the mean proximate values are used for calculation, with caloric equivalents of 9, 4, and 4 for fat, protein, and carbohydrate, respectively.

Intended use

This Reference Material (RM) is intended for use in evaluating analytical methods and instruments used for the determination of major, minor, and trace constituent elements in egg powder and other similar food, agricultural, and biological materials. A minimum sample mass of 500 mg is recommended.

This material is intended for laboratory use, not for human consumption.

Uncertainty

Original uncertainty estimates for RM 8415 were verified at NRC and were retained in this report. As stated in the RM 8415 report [1], uncertainties are imprecision estimates expressed as a 95% confidence interval, based on a sample mass of at least 500 mg. These uncertainties, based on between-method and between-laboratory, between-unit and within-unit estimates of variances, include measures of analytical method and laboratory imprecisions and biases and material inhomogeneity.

EGGS‑1
Date of Issue: September 2015
Date of Expiry: September 2025
Revised: March 2016 (editorial update)

Date modified: