Mass spectrometry , for example , can havedifficulty identifying a single component from within a mixture of manymolecules .
比如说质谱分析,要用它将一种单独的化学物质从众多分子混合物中分离出来就非常的困难。
And a liquid chromatography and mass spectrometry analysis of sample meteorites and the environments where they were found seems to confirm this .
陨石样品的液相色谱分析和质谱分析以及他们发现处的环境似乎证实了这一点。
To distinguish between primary and secondary aerosols , the scientists used techniques such as mass spectrometry to determine the amount of elemental carbon , water-soluble carbon , and carbon monoxide in the particles .
In 1988 , mr. davis founded the renowned livermore lab 's center for accelerator mass spectrometry , which reveals the chemical makeup of substances and has helped advance research across many disciplines .
Walter and his colleagues used x-ray fluorescence ( xrf ) spectrometry to determine the composition and thickness of each painted layer of the mona lisa in the louvre museum in paris , where the painting is normally kept behind bulletproof glass .
They also chose a relatively cheap technology , called mass spectrometry , to analyze dna .
他们还采用了一种相对便宜的质谱技术来分析dna。
They used a technique called secondary ion mass spectrometry ( sims ) , which allowed them to analyze the grains for a compound known as hydroxyl , which can be incorporated into apatite 's chemical structure if the mineral crystallizes from magma that contains water .
They also separated out the dna from the bacteria and analyzed its composition using a technique called high-resolution secondary ion mass spectrometry ; the isolated dna contained arsenic .
The technique , called secondary ion mass spectrometry , was developed to detect trace amounts of volatile gases such as chlorine and fluorine in earth soil samples .