Selenoprotein Detection via Microwave Acid Hydrolysis and HPLC-HG-AFS
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Solution Overview
Problem
Current methods for detecting selenoamino acids in selenoproteins, such as enzymatic hydrolysis, are complex, time-consuming, and costly, with incomplete hydrolysis and high operational expenses, making them unsuitable for wide-range applications.
Innovation Solution
A method involving microwave hydrolysis of selenoproteins with hydrochloric acid at 140-170°C for 10-40 minutes, followed by pH adjustment and detection using HPLC-HG-AFS, simplifies the process, reduces time and cost, and ensures complete hydrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If enzymatic hydrolysis method is used, then detection accuracy can be achieved, but operation complexity increases and time consumption increases
Solution Approach 1:
The patent replaces the enzymatic hydrolysis method (biological system) with acid hydrolysis method (chemical system). This substitution eliminates the need for multiple enzyme additions and shaking operations, significantly simplifying the operational complexity while maintaining hydrolysis effectiveness and detection accuracy.
Solution Approach 2:
The patent changes the hydrolysis conditions by using acid instead of enzymes, adjusting parameters such as hydrolysis time (3-24 hours), temperature (100-110°C), and acid concentration (6mol/L HCl). These parameter changes achieve complete hydrolysis while reducing operational steps compared to enzymatic methods.
2Measurement precision
If enzymatic hydrolysis method is used, then detection accuracy can be achieved, but time consumption increases
Solution Approach 1:
By substituting enzymatic hydrolysis with acid hydrolysis, the patent eliminates the need for multiple enzyme additions and extended incubation periods. The acid hydrolysis method achieves complete hydrolysis in 3-24 hours, significantly reducing the total time consumption while maintaining detection accuracy.
Solution Approach 2:
The patent skips the multiple intermediate steps required in enzymatic hydrolysis (multiple enzyme additions, repeated shaking, extended incubation) by using a single acid hydrolysis step. This rushing through of the process achieves the same hydrolysis result faster, reducing time consumption from over 30 hours to 3-24 hours.
3Reliability
If enzymatic hydrolysis method is used, then detection can be performed, but cost increases
Solution Approach 1:
The patent replaces expensive enzymes with inexpensive hydrochloric acid as the hydrolysis reagent. This substitution dramatically reduces the cost of analysis while maintaining reliable detection results. The acid can be used in large quantities without the cost concerns associated with expensive enzymatic reagents.
Solution Approach 2:
By changing from enzymatic to acid hydrolysis, the patent alters the chemical parameters of the process. The use of 6mol/L HCl at 100-110°C for 3-24 hours achieves complete hydrolysis at minimal cost, eliminating the need for expensive reference substances (several thousand RMB per sample) required by enzymatic methods.
4Reliability
If enzymatic hydrolysis method is used, then detection can be performed, but hydrolysis completeness worsens
Solution Approach 1:
The patent replaces the enzymatic system with an acid hydrolysis system that provides more complete hydrolysis. The strong acid (6mol/L HCl) under heated conditions (100-110°C) completely breaks down the selenoprotein structure, ensuring all selenoamino acids are released and detectable, unlike enzymatic methods that leave residual peptide chains.
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 method allows for quick and accurate detection of selenoamino acids, aligning with national standards, and is more efficient and cost-effective compared to traditional enzymatic hydrolysis methods.
Implementation Method 1
hydrolyzing with microwaves at 140-170° C. for 10-40 min
Implementation Method 2
mixing 10-30 mg of a selenoprotein sample with hydrochloric acid, and hydrolyzing with microwaves
Implementation Method 3
detecting a selenoamino acid in the pretreated solution with or using HPLC-HG-AFS
Implementation Method 4
HPLC-HG-AFS to separate the selenoamino acid which then enters the HG and is converted into hydrogen selenide (H2Se) which is in turn brought to the AFS by a carrier gas (argon) for detection
Data Source
AI summary
The present invention belongs to the technical field of analysis and detection and provides a method for detecting a selenoamino acid in a selenoprotein. The detection method includes: (1): mixing 10-30 mg of a selenoprotein sample with hydrochloric acid, and hydrolyzing with microwaves at 140-170° C. for 10-40 min to obtain a hydrolysate; (2): adjusting pH of the hydrolysate to 6-8 to obtain a pretreated solution; and, (3): detecting a selenoamino acid in the pretreated solution with high performance liquid chromatography-hydride generation-atomic fluorescence spectrometry (HPLC-HG-AFS) to obtain a content of the selenoamino acid. The method is simple in operation and provides an accurate and reliable result, and also reduces time and cost.