Oxygen-18 dej
Vim li cas ho tsis kam lees? Nug peb tam sim no!
Tiv tauj pebSpecifications
| Isotope Composition | |||
| O-18 | 98% atom | ||
| O-17 | 1 atom% | ||
| O-16 | 1 atom% | ||
| Kuaj | Specification | Kev Xeem | Method/Reference |
| Kev coj ua | ≤5µS/cm | 1.4 | Conductometer |
| Purity | > 99.9 | 99.93 ib | / |
| pH | ib 44355 | 6.1 | pH ntsuas |
| Tag nrho cov organic carbon | 0.1 | TOCanalyzer | |
| Deuterium | ≤ 0.015% ntawm | 0.015 ib | FT-IR |
| Endotoxin | 112 | LAL | |
| Microorganism | 1 | 9215 ib | |
| F | ≤ 0.5mg / L | 0.1 | IC |
| Cl | ≤ 0.5mg / L | 0.02 ib | IC |
| Br | ≤ 0.5mg / L | 0.1 | IC |
| NO 3 | ≤ 0.5mg / L | 0.077 ib | IC |
| SO4 | ≤ 0.5mg / L | 0.01 ib | IC |
| Zn | ≤ 0.5mg / L | 0.1 | ICP |
| Nrog | ≤ 0.5mg / L | 0.1 | ICP |
| Fe | ≤ 0.5mg / L | 0.1 | ICP |
| Twb | ≤ 3mg / L | 0.1 | ICP |
| K | ≤ 0.5mg / L | 0.1 | ICP |
| Qhov ntawd | ≤ 1mg / L | 0.1 | ICP |
| Mg | ≤ 0.5mg / L | 0.1 | ICP |
Lub cev thiab tshuaj muaj zog
| Lub cev lub xeev | Ua kua | |||
| Qhov tshwm sim | Ua kua | |||
| Molecular mass | 20.02 g / mol (tag nrho) | |||
| Xim | Tsis muaj xim | |||
| Melting point | 0 ° C | |||
| Qhov chaw khov | 0 ° C | |||
| Boiling point | 100 ° C (212 ° F) - lit | |||
| Lub ntiajteb txawj nqus / ntom | 1 g / ml ntawm 3.98 ° C | |||
cov khoom piav qhia
Enriched Oxygen-18 dej yog siv los ua lub hom phiaj uas yog bom-barded nrog kev pab los ntawm cyclotron los yog linear accelerator thiaj li yuav tsim Flourine-18. Flourine-18 yog synthesized rau hauv 2-deoxy-2- 18 F-β-D-glucopyranose (18 F-FDG) uas yog radiolabelled qab zib molecule siv hauv PET (Positron emission tomography) rau kev txiav txim siab qhov chaw ntawm cov piam thaj metabolism hauv thiab hauv zos. -ization ntawm ntau hom qog. Niaj hnub no 18 F-FDG yog qhov dav tshaj plaws thiab ua tiav PET radiopharmaceutical. 18 F-FDG yog ib qho analogue ntawm qabzib, nws yog txhaj rau hauv vivo thiab tom qab ntawd 18 F-FDG raug thauj los ntawm cov ntshav mus rau cov ntaub so ntswg hauv txoj kev zoo ib yam li cov piam thaj. Cells nqus FDG zoo li qabzib tab sis nws tsis tuaj yeem metabolized. Ib qho txiaj ntsig tseem ceeb ntawm FDG-PET yog tias nws pab txheeb xyuas theem thiab qhov chaw ntawm cov kab mob rov tshwm sim hauv ntau hom mob qog noj ntshav.
piav 2