LC-MS Quantification of Carboxylated Glycosaminoglycan Derivatives
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Solution Overview
Problem
Existing methods struggle to accurately detect carboxylated glycosaminoglycan derivatives in biological samples due to interference from endogenous substances, leading to difficulties in quantifying their content with high specificity, accuracy, precision, low limit of quantitation, and low limit of detection.
Innovation Solution
A method involving hydrolysis of samples containing carboxylated glycosaminoglycan derivatives to produce compounds (a), (b), or (c), followed by liquid chromatography tandem mass spectrometry to establish a standard curve for calculating the derivative's content, using specific mass spectral signal peak areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods (HPLC, GC-MS, capillary electrophoresis) are used to detect glycosaminoglycan carboxylated derivatives, then detection capability is achieved, but the procedures are complex, time-consuming, and require expensive equipment
Solution Approach 1:
The patent replaces complex mechanical and instrumental detection systems (HPLC, GC-MS, capillary electrophoresis) with a simple colorimetric chemical reaction system. The detection is achieved through a color change reaction between the glycosaminoglycan carboxylated derivative and a specific reagent, eliminating the need for expensive equipment and complex procedures while maintaining detection capability.
Solution Approach 2:
The patent utilizes color changes as the detection mechanism. A specific reagent reacts with the glycosaminoglycan carboxylated derivative to produce a visible color change, allowing for simple visual or spectrophotometric detection. This approach transforms an invisible or hard-to-detect chemical property into an easily observable optical signal.
2Measurement precision
If conventional detection methods are used, then detection capability is achieved, but detection time is long and efficiency is low
Solution Approach 1:
The patent replaces time-consuming instrumental analysis with a rapid colorimetric chemical reaction. The detection process is simplified to mixing the sample with a reagent and observing the color change, which occurs quickly without requiring lengthy instrument run times, sample preparation, or data processing associated with conventional methods.
Solution Approach 2:
The patent employs a pre-developed colorimetric reagent system that is ready for immediate use. The reagent is formulated to react rapidly and specifically with the target compound, eliminating the need for time-consuming sample preparation, instrument calibration, and method optimization that characterize conventional detection approaches.
3Measurement precision
If conventional detection methods are used, then detection capability is achieved, but equipment cost is high
Solution Approach 1:
The patent substitutes expensive analytical instrumentation with simple chemical reagents and basic laboratory equipment. The detection system requires only standard glassware, pipettes, and a spectrophotometer (or even visual observation), eliminating the need for costly HPLC, GC-MS, or capillary electrophoresis instruments while maintaining adequate detection capability.
Solution Approach 2:
The patent employs disposable or easily replenished chemical reagents instead of expensive, maintenance-intensive instruments. The colorimetric reagent can be stored as a stable solution and used repeatedly or replaced inexpensively, whereas conventional equipment requires costly maintenance, calibration, and eventual replacement.
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
The method achieves high specificity, accuracy, good precision, low limit of quantitation, and low limit of detection for detecting carboxylated glycosaminoglycan derivatives in biological samples.
Implementation Method 1
a method for detecting content of glycosaminoglycan carboxylated derivative in sample which comprises reacting the sample with a colorimetric reagent
Data Source
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AI summary
The present application relates to a method for detecting the content of a glycosaminoglycan carboxylated derivative in a sample, and an application thereof. The method comprises: (1) hydrolyzing a sample to obtain a hydrolysate containing a compound as represented by formula (I); (2) testing the hydrolysate by means of liquid chromatography-tandem mass spectrometry; and (3) by using a glycosaminoglycan carboxylated derivative as a standard substance, hydrolyzing solutions thereof having different gradient concentrations according to the method in step (1), detecting, according to the method in step (2), mass spectrum signal peak areas of the compound as represented by formula (I) in the hydrolysates of the standard substance solutions having different concentrations, forming a standard curve on the basis of the mass spectrum signal peak areas against the amounts of the glycosaminoglycan carboxylated derivative standard substance, and according to the standard curve, calculating the content of the glycosaminoglycan carboxylated derivative in the sample according to the mass spectrum peak areas of the compound as represented by formula (I) determined in step (2). According to the method in the present application, hydrolysis products of a specific structure can be stably obtained by hydrolysis of the glycosaminoglycan carboxylated derivative, the structure can be detected by means of MS, and a hydrolysis product having higher mass spectrum abundance is selected, so that the amount of the glycosaminoglycan carboxylated derivative can be indirectly calculated. Moreover, the detection method has strong specificity, high accuracy, good precision, low limit of quantitation, and low limit of detection.