The first high resolution LCMS-ion
trap-time-of-flight mass spectrometer
Featuring MSn Capability
Shimadzu's new LCMS-IT-TOF is a novel hybrid mass spectrometer
for biomarker discovery, metabolite identification and human health
research, and ideal for applications in forensics, drug development,
and proteomics. Coupling atmospheric pressure ionization with Ion-Trap
(IT) and Time-of-Flight (TOF) technologies, the LCMS-IT-TOF delivers
high mass accuracy and high mass resolution (10,000 at 1000 m/z)
independent of MS mode.
Key benefits and features
The LCMS-IT-TOF allows more qualitative information about a sample
to be collected in a single run.
This enables researchers and scientists to:
* Elucidate structures of new molecules
* Identify impurities and contaminants
* Analyze metabolites and biomarkers to evaluate biological pathways
The LCMS-IT-TOF has been designed to maximize sensitivity and
selectivity by optimizing the ion transport to the TOF analyzer
and redefining the capability of the quadrupole ion trap. The ion
trap is used to focus ions before ejection into the TOF as well
as supporting MSn analysis with effective precursor ion selection
capabilities (resolution > 1,000 at 1,000 m/z).
The new instrument incorporates a host of new technologies and
enhancements, including:
* Compressed Ion Injection (patented)
* Ballistic Ion Extraction (patented)
* Dual-Stage Reflectron (patented)
* New ion optics (patented)
* Temperature control of the flight tube (patent pending)
The source design, desolvation capillary and reduced collision
ion focusing Q-Array were adapted from Shimadzu's successful single-quad
HPLC mass spectrometer.
Combining new, innovative technologies with one of the fastest
polarity switching speeds available, the LCMS-IT-TOF expands the
power of mass spectrometry scanning to deliver unparalleled performance
for the most demanding analytical needs.
Formulae prediction software
High mass accuracy and mass resolution are powerful tools in determining
empirical formulae. However, to help increase the probability of
identifying the correct formulae, we have developed a new prediction
software tool that not only uses mass accuracy and isotope fitting
routines for MS it also uses the MSn information as well checking
for fragment masses.
This approach helps to increase the likelihood of identifying
the correct elemental composition and reduces the number of possible
candidates.
Metabolite Profiling software
Integrates chromatography and mass spectrometry data sets together
with statistical methods to help find components of biologically
significance.
Key features
* Data conversion:
Nominal and accurate mass conversion for Shimadzu instruments (also supports
ABI file formats).
* Project management:
A powerful tool used to describe the samples and assign biological and analytical
variables (including the status of the disease, treatment, condition and so
on). This helps use the integrated database to search for new biomarkers or
confirm existing markers for different disease states.
* Peak Alignment:
Select marker masses in different samples at different retention times. Choose
up to 10 different m/z values at 10 different retention times. Fit the data
using various fitting routines including:
o Linear
o Quadratic
o Cubic
o Quartic
o Point to point (with or without extrapolation)
* Peak peaking:
For each data file, the extracted mass chromatogram is generated for each m/z
value throughout the scan range. Peak picking is refined by using relative
peak threshold and smoothing options to help find all related peaks.
* Finding the differences | building arrays:
Once the chromatograms are aligned and the peaks have been selected the next
step is to identify the differences between the data sets using statistical
tools such as PCA-DA. By building data arrays which associate biological variables
(such as disease state or treatment variable) with mass spectrometry data,
specific components of a complex sample can be used to identify specific disease
biomarkers. Biomarkers can be metabolites, peptides and/or gene transcripts.
Protein identification software
The LCMS-IT-TOF is a powerful tool in protein research generating
information rich MS/MS spectra to help identify proteins.
Bringing together intelligent scanning tools for MS/MS analysis
it is possible to identify low abundant proteins in complex mixtures
and quickly link the data to a Mascot™ data base search (Matrix
Science). |