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 .

他们使用了一种叫做次级离子聚合光谱法（sims）的方法，对氢氧基这样的混合物颗粒进行分析，如果该矿物质可以在含水的岩浆里结晶，便可将其组成至磷灰石的化学结构中。

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 .

然后他们从细菌中提取出dna，利用高解析二次离子质谱技术分析了其中的化学组成，发现dna中也含有砷。

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 .

这个技术，也叫做次级离子质谱法，是开发来检测地球土壤样本中像氯气和氟气这样的挥发性气体的微量剂量的。

Other breath tests use various forms of mass spectrometry , that can identify and measure specific volatile organic compounds .

其他呼吸检测运用的是各种质谱分析方法，以识别和测量挥发性有机化合物的具体成分。