Ion Optical Element Contamination Detection in Mass Spectrometers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mass spectrometers face challenges in accurately identifying contaminated ion optical elements, leading to reduced measurement accuracy and sensitivity, and require skilled operators to determine which elements need cleaning, resulting in inefficiencies and potential damage during maintenance.
Innovation Solution
A mass spectrometer system that includes a controller for analyzing ion optical elements, a contaminant estimation unit to assess ion intensity changes during charge-up elimination operations, and a display processor to inform operators of contaminated elements, allowing for automated identification and targeted cleaning without relying on operator experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the operator uses experience-based inference to identify contaminated ion optical elements, then the identification process can be completed, but the efficiency and accuracy depend on operator skill level
Solution Approach 1:
The mass spectrometer automatically performs charge-up elimination operations and monitors ion intensity changes to identify contaminated ion optical elements without operator intervention. The system self-diagnoses contamination by sequentially applying reverse polarity voltages and detecting ion intensity variations, eliminating dependency on operator experience and skill level.
2Reliability
If all ion optical elements are taken out for cleaning, then complete cleaning is achieved, but the maintenance time increases significantly
Solution Approach 1:
The system extracts and identifies only the specific ion optical elements that are contaminated by monitoring ion intensity changes during automated charge-up elimination operations. Based on the identification results, only the contaminated elements are removed for cleaning, while clean elements remain in place, significantly reducing maintenance time while ensuring complete cleaning of necessary components.
3Reliability
If ion optical elements are cleaned frequently, then contamination is prevented, but the risk of damage and foreign substance attachment increases
Solution Approach 1:
The system performs preliminary identification of contaminated ion optical elements by automatically monitoring ion intensity changes during charge-up elimination operations before cleaning is required. This preliminary detection enables targeted cleaning only when and where contamination actually exists, preventing unnecessary cleaning operations that could cause damage or foreign substance attachment while maintaining effective contamination prevention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Automatically identifies and informs operators of contaminated ion optical elements, improving maintainability by ensuring only necessary elements are cleaned, reducing unnecessary operations and potential damage.
Implementation Method 1
the polarity of the direct-current voltage applied to the ion optical element is temporarily reversed
Implementation Method 2
the charge can be dispersed by the electrostatic repulsive force
Data Source
AI summary
After performing an analysis on a standard sample for a predetermined time, a plurality of ion optical elements such as an ion guide are sequentially selected one by one, and a direct-current voltage having a polarity different from that at the time of analysis is temporarily applied. Meanwhile, intensity data of ions having a specific m/z are continuously collected. After thus collecting the data, the ratio of the ion intensities before and after application of direct-current voltages having different polarities is calculated for each ion optical element, and it is determined whether or not the ratio is equal to or larger than a predetermined threshold value.