天津歐捷科技代理瑞士santis,英國labco,美國alpha,德國元素elementar,美國thermo等品牌耗材
USGS40,L-glutamic acid,谷氨酸,USGS實驗室同位素標準品 天津歐捷科技代理美國USGS實驗室同位素標準品,USGS40,L-glutamic acid,谷氨酸... USGS40,L-glutamic acid,谷氨酸,USGS實驗室同位素標準品 美國USGS實驗室同位素標準品
| 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 ‰ |