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The EXPEC 7350 ICP-MS/MS breaks through the limitations of conventional ICP-MS technology with an advanced engineering design and a series of innovative technological breakthroughs, bringing the domestic ICP-MS platform to a new level of performance. Its unique MS/MS mode significantly enhances interference removal capability, effectively resolving the most challenging analytical interferences and providing an ultimate solution for trace elemental analysis.
With unparalleled analytical performance, the EXPEC 7350 successfully overcomes interference issues that cannot be addressed by traditional ICP-MS systems. From environmental monitoring, food safety, and life sciences to semiconductor applications, the system delivers outstanding performance across a wide range of analytical fields. Even when handling highly complex and difficult sample matrices, the EXPEC 7350 ensures exceptionally reliable analytical results, empowering analysts to tackle increasingly demanding and high-end applications with confidence.
For the first time in ICP-MS technology, a vertical torch design has been introduced to significantly reduce salt deposition within the torch, effectively extending torch lifetime and addressing the challenges associated with the analysis of high-salt and complex matrix samples. In addition, argon gas consumption is greatly reduced, while heat and exhaust gases naturally rise into the exhaust system, minimizing cleaning requirements and reducing instrument downtime.
The system features a uniquely patented dual RF power supply design with ultra-fast impedance matching capability, delivering faster response, stronger interference resistance, and enhanced plasma stability. With no moving components, the all-solid-state RF system provides a more stable ICP plasma while maintaining a compact instrument design and improving overall analytical stability. The system also supports direct analysis of highly volatile organic solvents, including 100% ethanol.
Combined with the ultra-high matrix direct injection system and dedicated organic sample introduction system, the EXPEC 7350 ensures long-term stable and reliable analysis under virtually all complex matrix conditions.
The EXPEC 7350 is equipped with a uniquely designed self-excited all-solid-state RF generator capable of operating in cold plasma mode at powers as low as 500 W. This effectively suppresses the ionization of Ar-based interfering ions, significantly improving the signal-to-noise ratio of analyte ions such as 39K+, 40Ca+, and 56Fe+.
As a result, elemental detection limits are greatly enhanced, enabling superior performance in ultra-trace elemental analysis applications.
The EXPEC 7350 ICP-MS/MS fully unleashes the potential of the collision/reaction cell. Combining five-channel collision/reaction gases with advanced MS/MS technology, the system is capable of completely eliminating interferences while maintaining high sensitivity, even when analyzing extremely complex sample matrices, ensuring precise and reliable analytical results.
Tailored industry-specific solutions are available, including dedicated application packages for semiconductor analysis, online monitoring, and other specialized applications.
Practical applications have demonstrated that conventional ICP-MS systems combined with He kinetic energy discrimination (KED) technology can effectively reduce polyatomic interferences in high-matrix samples. However, such approaches remain limited in their ability to eliminate spectral interferences caused by isobaric ions and doubly charged ions, restricting their application range.
Under the reaction mode of traditional ICP-MS systems, a large number of unknown ions enter the collision/reaction cell together with target ions, generating unwanted by-product ions and creating new interferences that may compromise analytical accuracy.
In contrast, the next-generation EXPEC 7350 MS/MS mode incorporates an additional quadrupole mass filter (TQ Q1) positioned before the collision/reaction cell. This design allows only target ions to enter the cell while completely excluding interfering ions, dramatically improving sensitivity and signal-to-noise ratio. As a result, the EXPEC 7350 delivers highly reliable interference removal performance and is ideally suited for demanding applications across a wide range of analytical fields.
Ultra-trace sulfur analysis has long been a major analytical challenge. In optical emission spectroscopy, the characteristic emission lines of sulfur (S) are located in the ultraviolet region, resulting in relatively low sensitivity and high detection limits, which cannot meet the requirements for ultra-trace sulfur determination in high-purity reagents.
In conventional ICP-MS analysis, sulfur exhibits relatively low ionization efficiency, leading to weak analytical signals. Therefore, the high-abundance isotope ^32S^+ is typically selected as the target ion; however, it suffers from severe interference from ^16O_2^+ ions.
Under the reaction mode of traditional ICP-MS systems, ^32S^+ is converted into ^32S^16O^+ through mass-shift reactions for analysis. However, during the mass-shift process, new interferences such as ^48Ti^+, ^48Ca^+, and ^12C^18O_2^+ may also be generated, making accurate ultra-trace sulfur analysis difficult to achieve.
The next-generation ICP-MS/MS system introduces an additional quadrupole mass filter (TQ Q1) positioned before the collision/reaction cell. TQ Q1 precisely controls the ions entering the reaction cell, ensuring a controlled reaction process and effectively preventing the formation of non-target product ions generated by matrix elements and other analyte ions.
As a result, the EXPEC 7350 ICP-MS/MS can easily achieve sub-ppt detection limits, fully meeting the demanding requirements of ultra-trace analytical applications.
The normal concentration levels of arsenic in whole blood and serum are extremely low, and ICP-MS analysis often encounters severe matrix interferences when analyzing these complex biological samples.
Over the past decades, one of the most significant advancements in inductively coupled plasma mass spectrometry has been the introduction of collision/reaction cell technology for the removal of polyatomic interferences. However, even ICP-MS systems equipped with collision/reaction cells still face considerable challenges in the determination of ppt-level arsenic in complex matrices such as blood and serum.
For example, in collision mode, ^75As^+ can avoid interference from ^40Ar^35Cl^+, but remains susceptible to interference from ions such as ^150Nd^2+ and ^150Sm^2+. In reaction mode, the mass-shift product ion ^91As^16O^+ may still suffer from interferences caused by ions such as ^91Zr^+, ^51V^40Ar^+, and ^152W^2+, which cannot be completely and effectively eliminated, resulting in analytical inaccuracies.
In contrast, the ICP-MS/MS system, featuring dual mass filtering capability, effectively avoids such interference issues. Even under highly complex biological matrix conditions such as whole blood and serum, the EXPEC 7350 ICP-MS/MS can easily achieve sub-ppb detection limits while ensuring accurate and reliable analytical results.
For trace manganese (Mn) analysis in iron-rich matrices, Mn does not possess alternative isotopes for selection, making ^55Mn^+ the only available target ion for analysis. However, ^55Mn^+ is highly susceptible to severe tailing interference from the major matrix ions ^54Fe^+ and ^56Fe^+, creating significant challenges for conventional ICP-MS in the determination of trace Mn in Fe-based samples.
The next-generation EXPEC 7350 ICP-MS/MS is equipped with a 90° off-axis ion optics design and a triple pre-quadrupole structure, effectively reducing ion collision probability during ion transmission. This enables extremely low background noise and exceptional analytical sensitivity, while improving abundance sensitivity by more than two orders of magnitude.
As a result, the system effectively eliminates adjacent peak tailing interference and fully satisfies the requirements for accurate trace elemental analysis in complex matrix samples.
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