Stabilizer for L-012 Chemiluminescent Substrate
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Solution Overview
Problem
8-amino-5-chloro-7-phenylpyrido[3,4-d]pyridazine-1,4(2H,3H)-dione (L-012) or its salt experiences a decrease in measurement sensitivity when exposed to natural or artificial light, leading to errors in measurement values.
Innovation Solution
A stabilizer with a specific structure, including an azo group or imino group and a benzenesulfonic acid group, is coexistent with L-012 or its salt to suppress the reduction in luminescence intensity caused by light exposure, maintaining the original luminescence dose.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If L-012 or its salt is used as a chemiluminescent material, then measurement sensitivity is improved (10 times or more higher than luminol), but measurement sensitivity decreases upon exposure to natural light or artificial light
Solution Approach 1:
A stabilizer compound (formula 1) is introduced as an intermediary substance that mediates between L-012 and light exposure. The stabilizer absorbs or blocks the harmful effects of light on L-012 without interfering with the chemiluminescence reaction, thereby protecting the luminescent substrate while allowing high-sensitivity measurements to proceed
Solution Approach 2:
The stabilizer converts the harmful effect of light exposure (which causes decomposition of L-012) into a beneficial protective effect. By being present in the luminescent substrate solution, the stabilizer transforms what would be a detrimental light-L-012 interaction into a protected state where L-012 remains stable even during light exposure
2Power
If L-012 or its salt is used to replace luminol, then luminescence intensity is improved (10 times or more higher), but decomposition occurs upon light exposure causing measurement errors
Solution Approach 1:
The chemical composition parameter of the luminescent substrate solution is changed by adding the stabilizer compound (formula 1). This parameter change modifies the solution's properties to resist light-induced decomposition while preserving the high luminescence intensity characteristic of L-012
Solution Approach 2:
The luminescent substrate solution is transformed into a composite system containing L-012, the stabilizer compound (formula 1), and other solution components. This composite material combines the high luminescence properties of L-012 with the protective properties of the stabilizer, achieving both high intensity and light stability
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 stabilizer effectively prevents a decrease in measurement sensitivity due to light exposure, allowing for high-sensitivity and accurate measurement of target materials.
Implementation Method 1
L-012 (or a salt thereof) is known to have a luminescence intensity which is higher by 10 times or more than that of luminol
Implementation Method 2
a stabilizer which does not give an adverse effect during measurements and can suppress a decrease in measurement sensitivity by exposure
Data Source
AI summary
It is an object to provide a stabilizer for 8-amino-5-chloro-7-phenylpyrido[3,4-d]pyridazine-1,4(2H,3H)-dione (L-012) or a salt thereof, and the like, which does not give an adverse effect during measurements and can suppress a decrease in measurement sensitivity due to exposure by coexisting with the stabilizer and L-012 or a salt thereof. The present invention relates to a stabilizer for L-012 or a salt thereof, represented by the general formula [1], a stabilization method for L-012 or a salt thereof, coexisting with the stabilizer and L-012 or a salt thereof, and the like. wherein, p pieces of M1 each independently represent a hydrogen atom or an alkali metal atom, q pieces of R1 each independently represent a hydroxy group or a sulfonic acid group, m represents 0 or 1, p represents an integer of 1 to 3, q represents an integer of 0 to 4, Y represents a nitrogen atom or a CH group (a methine group), and Z represents an aryl group having a specific structure or a pyrazolyl group having a specific structure.