Inline Reagent Mixing With Holding Loop for Species-Stable Analysis
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Solution Overview
Problem
Current ICP spectrometry and ESI-MS techniques face challenges in distinguishing between different species of elements, leading to inaccurate analysis due to species interconversion during sample preparation and inconsistent reaction kinetics when introducing chemical agents manually or serially.
Innovation Solution
A system for controlled, inline introduction of chemical agents into fluid samples using a valve and pump system, allowing precise control over the interaction time between the sample and chemical agents before analysis, enabling real-time analysis with improved accuracy and consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chemical agents are introduced manually or serially to fluid samples, then the analysis can be performed with standard equipment, but species interconversion occurs during sample preparation and reaction kinetics become inconsistent
Solution Approach 1:
The system performs preliminary actions by pre-configuring the inline mixing system with precise flow control capabilities before sample analysis. The chemical agents are prepared and positioned in the flow path in advance, allowing controlled introduction at the optimal moment. This preliminary setup eliminates the need for manual intervention during analysis and ensures consistent reaction conditions across all samples.
Solution Approach 2:
The patent replaces manual mechanical introduction of chemical agents with an automated inline fluid mixing system. The manual operation of adding reagents is substituted by electronically controlled pumps and flow mixers that precisely deliver chemical agents directly into the sample stream. This substitution eliminates human error and variability, ensuring consistent reaction kinetics and preventing species interconversion during the addition process.
2Measurement precision
If chemical agents are added to fluid samples, then detection of species of interest can be enhanced, but species interconversion occurs during the interaction period
Solution Approach 1:
The inline mixing system acts as an intermediary between the chemical agents and the fluid sample. It provides a controlled environment where reagents are thoroughly mixed with the sample in a defined flow path, ensuring uniform distribution before analysis. This intermediary system prevents direct, uncontrolled interaction that would cause species interconversion, while still enabling the necessary chemical reactions for enhanced detection of target species.
Solution Approach 2:
The system maintains continuous flow and mixing of the sample with chemical agents through the inline system, eliminating discrete addition steps that cause delays and composition changes. The continuous action ensures that reactions proceed under controlled conditions without interruption, preventing species interconversion while maintaining the stability of the sample matrix throughout the analysis process.
3Device complexity
If manual or serial introduction of chemical agents is used, then equipment complexity is reduced, but productivity and analysis efficiency decrease
Solution Approach 1:
The patent merges multiple functions into a single inline mixing system: sample introduction, chemical agent addition, mixing, and delivery to the analyzer all occur in one continuous flow path. This consolidation eliminates the need for separate manual addition steps and serial processing, significantly increasing productivity while maintaining relatively simple equipment architecture. The merged system processes multiple samples continuously without the downtime associated with manual reagent addition.
4Reliability
If interaction time between chemical agents and samples is extended to ensure complete reaction, then reaction completeness improves, but species interconversion increases during the extended period
Solution Approach 1:
The system dynamically controls the interaction time between chemical agents and samples by adjusting flow rates and mixing parameters in real-time. The inline mixing system allows precise control over residence time in the reaction zone, ensuring complete reaction occurs within a defined, optimized time window. This dynamic control prevents both incomplete reactions and excessive interaction times that would cause species interconversion, maintaining both reliability and measurement precision.
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
This approach allows for precise control over the interaction time between chemical agents and samples, reducing species interconversion and reaction inconsistencies, thereby enhancing the accuracy and reliability of elemental analysis in ICP spectrometry and ESI-MS.
Implementation Method 1
introducing, via a pump system, the fluid sample and the chemical agent inline via a mixing port of the valve system to produce a mixed sample
Implementation Method 2
holding the mixed sample within the sample holding loop for a holding period of time to permit a reaction between the fluid sample and the chemical agent
Implementation Method 3
ICP spectrometry employs electromagnetically generated partially ionized argon plasma which reaches a temperature of approximately 7,000K. When a sample is introduced to the plasma, the high temperature causes sample atoms to become ionized or emit light.
Implementation Method 4
the high temperature causes sample atoms to become ionized or emit light
Implementation Method 5
Electrospray ionization mass spectrometry (ESI-MS) is an analysis technique that applies a voltage to a liquid sample to produce an ionized electrospray for analysis by a mass spectrometer
Implementation Method 6
a sample introduction system may withdraw an aliquot of a liquid sample from a container and thereafter transport the aliquot to a nebulizer that converts the aliquot into a polydisperse aerosol suitable for ionization in plasma
Data Source
AI summary
Systems and methods for controlled, inline introduction of chemical agents to an inline fluid sample are described. A method embodiment includes, but is not limited to, receiving a fluid sample with a valve; receiving a chemical agent with the valve; introducing the fluid sample and the chemical agent inline via a mixing port of the valve to produce a mixed sample; transferring the mixed sample to a second valve; directing the mixed sample to a sample holding loop fluidically coupled with the second valve; holding the mixed sample within the sample holding loop for a holding period of time to permit a reaction between the fluid sample and the chemical agent; and directing the mixed sample from the sample holding loop to an analytic instrument following expiration of the holding period of time.