GIPS-1: Ginseng Root Reference Material for Pesticides, Trace Metals and other Constituents

The following tables show those constituents for which reference and information values have been established for this ginseng root reference material (RM).

The expanded uncertainty (UCRM) in the certified value is equal to U = kuc where uc is the combined standard uncertainty calculated according to the JCGM Guide [1] and k is the coverage factor. A coverage factor of two (2) was applied for all elements. It is intended that UCRM accounts for every aspect that reasonably contributes to the uncertainty of the measurement. All listed values are expressed on a dry mass basis.

Table 1: Reference values for GIPS-1

Compound Mass fraction,
mg/kg
pentachlorobenzene (g) 0.645 ± 0.034
pentachloronitrobenzene (g) (f) 0.461 ± 0.018
pentachloroaniline (g) 0.355 ± 0.008

Table 1 (continued): Reference values for GIPS-1

Element Mass fraction,
mg/kg
aluminium (d,e) 550 ± 72
boron (c,e) 9.1 ± 3.0
barium (c) 23.1 ± 7.0
calcium (c,d,e) 2990 ± 340
cadmium (c) 0.053 ± 0.012
copper (c,d,e) 6.01 ± 0.48
iron (c,d,e) 310 ± 60
potassium (c,d,e) 16 000 ± 600
magnesium (c,d,e) 2500 ± 140
manganese (c,d,e) 32.8 ± 3.4
molybdenum (c,d,e) 0.62 ± 0.10
sodium (c,d,e) 500 ± 60
nickel (c,d) 1.2 ± 0.4
phosphorus (c,d,e) 2530 ± 140
strontium (c,d,e) 52 ± 8
zinc (c,d,e) 17.5 ± 1.4

Table 2: Information values for GIPS-1

Element Mass fraction,
mg/kg
antimony (c) 0.006
cerium (c) 0.43
chromium (d) 2.1
cobalt (b,d) 0.26
lead (c) 0.10
rubidium (c) 3.6
sulfur (e) 1290
uranium (e) 0.018
vanadium (c,d,e) 0.57

Coding

The coding refers to the instrumental method of analyte determination.

  • a – Isotope dilution inductively-coupled plasma mass spectrometry (ID-ICP-MS)
  • b – Standard addition inductively-coupled plasma mass spectrometry (ICP-MS)
  • c – Inductively-coupled plasma mass spectrometry (ICP-MS)
  • d – Standard addition inductively-coupled plasma atomic emission spectroscopy (ICP-AES)
  • e – Inductively-coupled plasma atomic emission spectroscopy (ICP-AES)
  • f – Isotope dilution gas chromatography ICP-MS (ID-GC-ICP-MS)
  • g – Isotope dilution gas chromatography mass spectrometry (ID-GC-MS)

Intended use

This Reference Material (RM) is intended for use in the calibration of procedures and the development of methods for the determination of pesticides and major, minor, and trace constituent elements in ginseng root and other similar food, agricultural, and biological materials. A minimum sample mass of 250 mg is recommended.

Uncertainty

Included in the overall combined uncertainty estimate (uc) are uncertainties in the batch characterization (uchar), uncertainties related to possible between-bottle variation (uhom), uncertainties related to short-term stability (ustability), and uncertainties related to inconsistency between the various measurement methods (umethod). Expressed as standard uncertainties, these components are listed in Table 3.

Table 3: Uncertainty Components for GIPS-1

Element uc,
mg/kg
uchar,
mg/kg
uhom,
mg/kg
ustability,
mg/kg
umethod,
mg/kg
pentachlorobenzene 0.017 0.002 0.010 0 0
pentachloronitrobenzene 0.009 0.006 0.005 0.005 0
pentachloroaniline 0.004 0.002 0.003 0.002 0

Table 3 (continued): Uncertainty Components for GIPS-1

Element uc,
mg/kg
uchar,
mg/kg
uhom,
mg/kg
ustability,
mg/kg
umethod,
mg/kg
aluminium 36 36 0 0 0
boron 1.5 1.3 0 0 0.7
barium 3.5 1.3 0 0 3.3
calcium 170 80 0 0 150
cadmium 0.006 0.002 0 0 0.006
copper 0.24 0.24 0.04 0 0
iron 30 20 0 0 20
potassium 300 300 0 0 0
magnesium 70 50 50 0 0
manganese 1.7 1.6 0.6 0 0
molybdenum 0.05 0.05 0.01 0 0
sodium 30 20 10 0 20
nickel 0.2 0.1 0.1 0 0.2
phosphorus 70 70 0 0 0
strontium 4 2 1 0 3
zinc 0.7 0.7 0 0 0

Date of issue: February 2016
Date of expiry: February 2021

Date modified: