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Steroid carbon isotope ratio standard mixture reference material for GCC-IRMS Carbon isotope delta value reported for 5α-androstan-3β-ol acetate (δ13CVPDB / ‰ -32.00 ±0.09), 5α-androstan-3α-ol-17-one acetate(δ13CVPDB / ‰ -32.58 ± 0.03), 5β-drostan-3α-ol-11,17-dione acetate (δ13CVPDB / ‰ -16.50 ± 0.03),and 5α-cholestane (δ13CVPDB / ‰ -24.90 ± 0.05) Carbon isotope delta value reported for 5α-androstan-3β-ol acetate (δ13CVPDB / ‰ -32.00 ±0.09), 5α-androstan-3α-ol-17-one acetate(δ13CVPDB / ‰ -32.58 ± 0.03), 5β-drostan-3α-ol-11,17-dione acetate (δ13CVPDB / ‰ -16.50 ± 0.03),and 5α-cholestane (δ13CVPDB / ‰ -24.90 ± 0.05) CU-PCC 33-2 甾体碳同位素标准物质
Steroid carbon isotope ratio standard mixture reference material for GCC-IRMS Carbon isotope delta value reported for 5β-androstan-3α-ol-17-one (δ13CVPDB / ‰ -28.75 ±0.01), 5α-androstan-3α-ol-17-one (δ13CVPDB / ‰ -26.74 ± 0.03), 5β-pregnan-3α, 20α-diol (δ13CVPDB /‰ -18.65 ± 0.03) Carbon isotope delta value reported for 5β-androstan-3α-ol-17-one (δ13CVPDB / ‰ -28.75 ±0.01), 5α-androstan-3α-ol-17-one (δ13CVPDB / ‰ -26.74 ± 0.03), 5β-pregnan-3α, 20α-diol (δ13CVPDB /‰ -18.65 ± 0.03) CU-PCC 34-3
Steroid carbon isotope ratio standard mixture reference material for GCC-IRMS Carbon isotope delta value reported for 5α-androstan-3α-ol-17-one (δ13CVPDB / ‰ -7.09 ±0.07) Carbon isotope delta value reported for 5α-androstan-3α-ol-17-one (δ13CVPDB / ‰ -7.09 ±0.07) CU-PCC 40-1
Steroid carbon isotope ratio standard mixture reference material for GCC-IRMS Carbon isotope delta value reported for 5α-androstan-3α-ol-17-one acetate (δ13CVPDB / ‰ -32.82 ± 0.02) Carbon isotope delta value reported for 5α-androstan-3α-ol-17-one acetate (δ13CVPDB / ‰ -32.82 ± 0.02) CU-PCC 41-1
Steroid carbon isotope ratio standard mixture reference material for GCC-IRMS Carbon isotope delta value reported for 5α-cholestane (δ13CVPDB / ‰ -25.03 ± 0.01) Carbon isotope delta value reported for 5α-cholestane (δ13CVPDB / ‰ -25.03 ± 0.01) CU-PCC 42-1
Steroid carbon isotope ratio standard mixture reference material for GCC-IRMS Carbon isotope delta value reported for 5α-androstan-3α-ol-17-one acetate (δ13CVPDB / ‰ -32.73 ± 0.06), 5β-androstan-3α, 17β-diacetate(δ13CVPDB / ‰ -30.19 ± 0.07), 5α-cholestane(δ13CVPDB / ‰ -24.83 ± 0.13), and 5β- pregnan-3α,20α-diacetate (δ13CVPDB / ‰ -21.16 ± 0.08) Carbon isotope delta value reported for 5α-androstan-3α-ol-17-one acetate (δ13CVPDB / ‰ -32.73 ± 0.06), 5β-androstan-3α, 17β-diacetate(δ13CVPDB / ‰ -30.19 ± 0.07), 5α-cholestane(δ13CVPDB / ‰ -24.83 ± 0.13), and 5β- pregnan-3α,20α-diacetate (δ13CVPDB / ‰ -21.16 ± 0.08) CU-PCC 44-1