Isotopic Standards

isotope standards, isotopic standards

ISC Science offers a selection of Isotopic Standards that are designed for quantitative analysis by Isotope Dilution Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The stable "non-radioactive" Isotope Standards are certified in concentration and abundances according to ISO 17034 and ISO/IEC 17025.

Abundance values are reported as porcentage (%) and concentration values as micrograms of element per gram of solution (μg/g). The certified concentration values were determined by ICP-MS using the primary method Isotope Dilution Mass Spectrometry (IDMS) and certified abundance values were determined ICP-MS using an internal method. The expanded uncertainty for each certified value was calculated as U = 2 · u, where k = 2 is the coverage factor for a 95% confidence interval and u is the combined standard uncertainty calculated according to ISO Guide 35. The value of u is intended to represent the combined effect of uncertainty components associated with the gravimetric preparation, the IDMS determination, homogeneity and stability for concentration values and the ICP-MS determination for abundance values.

Stability of this material is based upon rigorous long-term (storage conditions) testing of the solution for the certified value. This testing includes, but is not limited to, the effect of temperature.

Certified Reference Materials (CRM) are provided with the following general characteristics:

  Certified concentrations:
  10 - 100 ug/g
  Certified abundances (equal to or greater than 0.1%):   See product information
  Minimum isotope enrichment (if not speficied otherwise)*:   90%
  Maximum expanded uncertainty of concentration values (95% confidence level)*:   10% of the certified value
  Maximum expanded uncertainty of abundance values (95% confidence level)*:
  0.4 %

*for specific information about the characteristics of a product, please contact us at isc_arroba_isc-science.com. The characteristics shown here are general for all products within this category.

Our Certified Reference Materials can be used in Isotope Dilution Analysis to: Determine the element concentration in other materials; Precision control; Bias control

The different marketed standards are shown below. To see the specific characteristics of each product, click on "View product".

6Li Isotopic Standard

6Li-enriched Lithium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 6Li and 7Li.

10B Isotopic Standard

10B-enriched Boron Isotopic Standard Solution - Certified Reference Material

Certified abundances: 10B and 11B

34S Isotopic Standard

34S-enriched Sulfur Isotopic Standard Solution - Certified Reference Material

Certified abundances: 32S, 33S, 34S and 36S.

50Cr(III) Isotopic Standard

50Cr(III)-enriched Chromium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 50Cr, 52Cr, 53Cr and 54Cr.

50Cr(VI) Isotopic Standard

50Cr(VI)-enriched Chromium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 50Cr, 52Cr, 53Cr and 54Cr.

53Cr(III) Chromium Isotopic Standard

53Cr(III)-enriched Chromium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 50Cr, 52Cr, 53Cr and 54Cr.

53Cr(VI) Chromium Isotopic Standard

53Cr(VI)-enriched Chromium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 50Cr, 52Cr, 53Cr and 54Cr.

54Fe Iron Isotopic Standard

54Fe-enriched Iron Isotopic Standard Solution - Certified Reference Material

Certified abundances: 54Fe, 56Fe, 57Fe and 58Fe

57Fe Iron Isotopic Standard

57Fe-enriched Iron Isotopic Standard Solution - Certified Reference Material

Certified abundances: 54Fe, 56Fe, 57Fe and 58Fe

61Ni Nickel Isotopic Standard

61Ni-enriched Nickel Isotopic Standard Solution - Certified Reference Material

Certified abundances: 58Ni, 60Ni, 61Ni, 62Ni and 64Ni.

65Cu Copper Isotopic Standard

65Cu-enriched Copper Isotopic Standard Solution - Certified Reference Material

Certified abundances: 63Cu and 65Cu.

67Zn Zinc Isotopic Standard

67Zn-enriched Zinc Isotopic Standard Solution - Certified Reference Material

Certified abundances: 64Zn, 66Zn, 67Zn, 68Zn and 70Zn.

70Zn Zinc Isotopic Standard

70Zn-enriched Zinc Isotopic Standard Solution - Certified Reference Material

Certified abundances: 64Zn, 66Zn, 67Zn, 68Zn and 70Zn.

77Se Selenium Isotopic Standard

77Se-enriched Selenium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 74Se, 76Se, 77Se, 78Se, 80Se and 82Se.

86Sr Strontium Isotopic Standard

86Sr-enriched Strontium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 84Sr, 86Sr, 87Sr and 88Sr.

87Rb Rubidium Isotopic Standard

87Rb-enriched Rubidium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 85Rb and 87Rb.

95Mo Molybdenum Isotopic Standard

95Mo-enriched Molybdenum Isotopic Standard Solution - Certified Reference Material

Certified abundances: 92Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo and 100Mo.

109Ag Silver Isotopic Standard

109Ag-enriched Silver Isotopic Standard Solution - Certified Reference Material

Certified abundances: 107Ag and 109Ag

111Cd Cadmium Isotopic Standard

111Cd-enriched Cadmium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 106Cd,  108Cd,  110Cd,  111Cd,  112Cd,  113Cd,  114Cd and  116Cd

119Sn Tin Isotopic Standard

119Sn-enriched Tin Isotopic Standard Solution - Certified Reference Material

Certified abundances: 112Sn, 114Sn, 115Sn, 116Sn, 117Sn, 118Sn, 119Sn, 120Sn, 122Sn and 124Sn

123Sb Antimony Isotopic Standard

123Sb-enriched Antimony Isotopic Standard Solution - Certified Reference Material

Certified abundances: 121Sb and 123Sb

137Ba Barium Isotopic Standard

137Ba-enriched Barium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 130Ba, 132Ba, 134Ba, 135Ba, 136Ba, 137Ba and 138Ba.

199Hg Mercury Isotopic Standard

199Hg-enriched Mercury Isotopic Standard Solution - Certified Reference Material

Certified abundances: 196Hg, 198Hg, 199Hg, 200Hg, 201Hg, 202Hg and 204Hg.

201Hg Mercury Isotopic Standard

201Hg-enriched Mercury Isotopic Standard Solution - Certified Reference Material

Certified abundances: 196Hg, 198Hg, 199Hg, 200Hg, 201Hg, 202Hg and 204Hg.

203Tl Thallium Isotopic Standard

203Tl-enriched Thallium Isotopic Standard Solution - Certified Reference Material

Certified abundances: 203Tl and 205Tl

207Pb Lead Isotopic Standard

207Pb-enriched Lead Isotopic Standard Solution - Certified Reference Material

Certified abundances: 204Pb, 206Pb, 207Pb and 208Pb

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