
時(shí)間:2020-09-30 15:49 ? ? ? 來(lái)源:A加未來(lái)國(guó)際教育 ? ? ?

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質(zhì)譜法(Mass Spectrometry,MS)即用電場(chǎng)和磁場(chǎng)將運(yùn)動(dòng)的離子(帶電荷的原子、分子或分子碎片,有分子離子、同位素離子、碎片離子、重排離子、多電荷離子、亞穩(wěn)離子、負(fù)離子和離子-分子
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質(zhì)譜法(Mass Spectrometry,MS)即用電場(chǎng)和磁場(chǎng)將運(yùn)動(dòng)的離子(帶電荷的原子、分子或分子碎片,有分子離子、同位素離子、碎片離子、重排離子、多電荷離子、亞穩(wěn)離子、負(fù)離子和離子-分子相互作用產(chǎn)生的離子)按它們的質(zhì)荷比分離后進(jìn)行檢測(cè)的方法。測(cè)出離子準(zhǔn)確質(zhì)量即可確定離子的化合物組成。下面A加未來(lái)小編就帶大家一起來(lái)解析Alevel化學(xué)知識(shí)點(diǎn)中關(guān)于質(zhì)譜儀和質(zhì)譜的內(nèi)容,一起來(lái)了解一下吧!
涉及到Alevel化學(xué)知識(shí)點(diǎn):
Mass spectrometer(質(zhì)譜儀)
Edexcel考試局大綱要求:
be able to predict mass spectra,including relative peak heights,for diatomic
molecules,including chlorine,given the isotopic abundances
CAIE考試局大綱要求(9701):
a)analyse mass spectra in terms of isotopic abundances
(knowledge of the working of the mass spectrometer is not required)
b)calculate the relative atomic mass of an element given the relative
abundances of its isotopes,or its mass spectrum
AQA考試局大綱要求:
The principles of a simple time of flight(TOF)mass spectrometer,limited to ionisation,acceleration to give all ions constant kinetic energy,ion drift,ion detection,data analysis.
The mass spectrometer gives accurate information about relative isotopic mass and also about the relative abundance of isotopes.
Mass spectrometry can be used to identify elements.
Mass spectrometry can be used to determine relative molecular mass.
講解內(nèi)容:
Mass spectrometer的工作原理
包括Ionisation、acceleration、deflection等等
質(zhì)譜(Mass spectrum)的相關(guān)計(jì)算
如何認(rèn)知質(zhì)譜(Mass spectrum)以及利用質(zhì)樸計(jì)算相對(duì)原子質(zhì)量Ar
適用于考試局:
AQA、Edexcel、CAIE等
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