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USGS40,L-glutamic acid,谷氨酸,USGS实验室同位素标准品 天津欧捷科技代理美国USGS实验室同位素标准品,USGS40,L-glutamic acid,谷氨酸... USGS40,L-glutamic acid,谷氨酸,USGS实验室同位素标准品 美国USGS实验室同位素标准品
| USGS40 | L-glutamic acid | 2 g | δ15N = —4.52 ‰ δ13C = —26.39 ‰ |
| USGS41a | L-glutamic acid enriched in 13C & 15N | 0.5 g | δ15N = +47.55 ‰ δ13C = +36.55 ‰ |
| USGS41 | L-glutamic acid enriched in 13C & 15N | 0.5 g | δ15N = +47.57 ‰ δ13C = +37.63 ‰ |
| USGS42 | Tibetan human hair powder (< 100 mesh) | 0.5 g | δ2H = —72.9 ‰ δ18O = +8.56 ‰ δ15N = +8.05 ‰ δ13C = —21.09 ‰ δ34S = +7.84 ‰ |
| USGS43 | Indian human hair powder (< 60 mesh) | 0.5 g | δ2H = —44.4 ‰ δ18O = +14.11 ‰ δ15N = +8.44 ‰ δ13C = —21.28 ‰ δ34S = +10.46 ‰ |
