Video: Gas chromatography siv li cas hauv kev tshawb nrhiav hluav taws?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
1 Cov kws tshawb fawb thiab ua txhaum cai cov kws tshawb nrhiav siv ntau yam kev tshuaj ntsuam xyuas los txiav txim seb hom accelerants siv pib lub hluav taws . Hauv chav kuaj no, koj yuav siv roj chromatography ( GC ) los txiav txim qhov muaj pes tsawg leeg thiab / lossis cov qauv ntawm cov khoom siv hluav taws xob siv raws li tus accelerant pom nyob rau ntawm ib tug ua txhaum cai scene.
Ntawm no, yuav siv cov roj chromatography li cas hauv kev txheeb xyuas qhov sib xyaw?
Gas chromatography ( GC ) yog ib hom ntawm siv chromatography hauv analytical chemistry rau kev sib cais thiab kev txheeb xyuas tshuaj sib xyaw uas ua tau yuav vaporized yam tsis muaj decomposition. Lub gaseous tshuaj sib xyaw raug soj ntsuam cuam tshuam nrog cov phab ntsa ntawm kem, uas yog coated nrog rau theem nyob ruaj khov.
Ib yam li ntawd, chromatography siv li cas hauv kev sim tshuaj? Chromatography yog ua pa ntawm Huab cua tshiab rau Kev Xeem Tshuaj . Qhov zoo qub-fashioned txoj kev ntawm kuaj tshuaj Nws suav nrog kev tshuaj xyuas cov qauv tso zis kom pom cov ntsiab lus ntawm cov khoom txwv tsis pub nyob hauv tus neeg mob lub cev. Nws tau sim, nws yog kuaj , nws ua haujlwm.
Ib yam li ntawd, koj tuaj yeem nug, cov neeg tshawb nrhiav Arson yuav ua li cas thiaj nrhiav tau cov neeg nrawm?
Lub cev ntsuas tau siv mus ntes lub xub ntiag ntawm accelerants yog localized hlawv qauv rau cov plag tsev thiab qhov chaw thiab nyiaj siv ua haujlwm puas tsuaj tsis sib haum nrog cov roj uas muaj nyob hauv ib txwm muaj. Qhia los ntawm hluav taws fighters los yog pom ntawm ib tug ceev ceev hluav taws los yog cov ntxhiab tsw phem ua tau kuj qhia txog lub xub ntiag ntawm ib qho ceev.
Yuav siv chromatography li cas los daws cov teeb meem txhaum cai?
Keeb kwm: Chromatography yog ib txoj hauv kev los tshuaj xyuas cov khoom sib tov los ntawm kev sib cais rau hauv cov tshuaj uas lawv tau tsim. Cov kws tshawb fawb forensic muaj peev xwm siv tus cwj mem chromatography rau daws teeb meem txhaum cai los ntawm kev sib piv cov ntaub ntawv los yog stains pom ntawm a kev ua txhaum scene rau tus cim lossis cwj mem uas yog tus neeg raug liam.
Pom zoo:
Txoj cai lij choj ntawm kev txuag hluav taws xob siv li cas rau kev hloov hluav taws xob?
Txoj cai lij choj ntawm kev txuag hluav taws xob hais tias lub zog tsis tuaj yeem tsim lossis rhuav tshem - tsuas yog hloov los ntawm ib hom ntawm lub zog mus rau lwm qhov. Qhov no txhais tau hais tias ib qho system ib txwm muaj tib lub zog, tshwj tsis yog nws ntxiv los ntawm sab nraud. Tib txoj kev siv lub zog yog hloov lub zog ntawm ib daim ntawv mus rau lwm qhov
Dab tsi yog cov yam ntxwv ua siab hloov hluav taws xob hloov hluav taws xob LET muaj thaum piv nrog LET hluav taws xob tsawg?
Dab tsi yog cov yam ntxwv ua kom muaj hluav taws xob hloov hluav taws xob siab (LET) hluav taws xob muaj thaum piv nrog cov hluav taws xob qis-LET? Cov huab hwm coj ntau ntxiv, txo qhov nkag mus. (Vim lawv cov nqi hluav taws xob thiab cov khoom loj heev, lawv ua rau ntau ionizations hauv cov ntaub so ntswg, sai sai poob lub zog
Puas yog hluav taws xob them nqi hluav taws xob tsuas yog hluav taws xob lossis yog tus nqi ntawm tag nrho cov atoms?
Tus nqi zoo attracts tus nqi tsis zoo thiab ua rau lwm tus nqi zoo. Puas yog hluav taws xob them nqi hluav taws xob tsuas yog hluav taws xob lossis yog tus nqi ntawm tag nrho cov atoms? Cov nqi hluav taws xob yog cov cuab yeej ntawm tag nrho cov atoms
Dab tsi yog kauj ruam transformers siv hauv kev xa hluav taws xob hluav taws xob?
Cov hluav taws xob hluav taws xob tau xa mus rau qhov ntev ntawm qhov hluav taws xob siab. Yog li, cov kauj ruam nce transformers yog siv ntawm cov chaw nres tsheb fais fab kom nce qhov hluav taws xob ntawm lub zog whereas cov kauj ruam-down transformers yog siv los txo qhov voltage mus txog 220 V
Lub co2 hluav taws tua hluav taws puas ua haujlwm ntawm hluav taws kub oxidizer?
Lub tshuab tua hluav taws xob carbon dioxide tsis yog qhov kev xaiv zoo rau kev tua hluav taws oxidizer vim nws ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev tsis suav nrog cov pa oxygen, thiab cov pa oxygen atmospheric tsis xav tau rau hluav taws kub oxidizer. Cov tshuaj tua hluav taws qhuav qhuav kuj tseem yuav siv tsis tau rau feem ntau