Development of nanoinjector devices for electrospray ionization - tandem mass spectrometry (ESI-MSn)

Journal of the Brazilian Chemical Society

Nakayasu, Ernesto S.¹  Universidade Federal de São Paulo, Diadema, Brazil¹  Daffre, Sirlei¹  Universidade de São Paulo, São Paulo, Brazil¹  Universidade de São Paulo¹  Assunção, Nilson A.¹  Carrilho, Emanuel¹ 

关键词: mass spectrometry;    nanoinjector;    microsystems;   

DOI  :  

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

In mass spectrometric (MS) systems with electrospray ionization (ESI), the sample can be analyzed coupled to separation systems (such as liquid chromatography or capillary electrophoresis) or simply by direct infusion. The greatest benefit of the type of injection is the possibility of continuous use of small amounts of samples over a long period of time. This extended analysis time allows a complete study of fragmentation by mass spectrometry, which is critical for structure elucidation of new compounds, or when using an ion trap mass analyzer. The injector filled with the sample is placed at the ESI source inlet creating an electric field suitable for the continuous formation of a spray (solvent and sample) and consequently, the gradual and even release of the sample. For the formation of the spray, is necessary that the injector end is metalized. The formation of a bilayer of titanium and gold provided an excellent attachment of the film, resulting in a nanoinjector for ionization/spray formation in the system for MS. The nanoinjectors showed high repeatability and stability over 100 min by continuous sampling with 10 µL of sample.

【 授权许可】

Unknown