Iodide Ion Detection Kit Using Copper Sulfate Precipitation
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Solution Overview
Problem
Existing methods for determining iodide ion concentrations require well-equipped laboratory conditions, significant expertise, and high costs, making them inaccessible for widespread use, especially in resource-limited settings, and there is a need for a rapid, low-cost method to detect iodine deficiency.
Innovation Solution
A method involving the addition of copper(I) or gold(III) ions to urine samples to form a visible precipitate, allowing iodide ion concentration to be determined by observing the formation of a water-insoluble iodide salt, using readily available and non-toxic metal salts like CuSO4 or AuCl3, with a kit and simple steps to perform the test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If classical titration procedures or ion chromatography methods are used to determine iodide ion concentration, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the essential detection function from complex laboratory equipment by using a simple colorimetric reaction. The iodide ion detection is isolated to a single test tube reaction using copper(II) sulfate solution, eliminating the need for chromatography columns, electrochemical detectors, and other complex apparatus while maintaining sufficient measurement precision for clinical purposes
Solution Approach 2:
The patent creates a simplified copy of the iodide detection function that can be performed outside the laboratory. By using the color change of copper(II) sulfate reaction with iodide ions, the method reproduces the essential detection capability using readily available reagents and simple visual observation, making it accessible for home use without specialized equipment
2Productivity
If inductively coupled plasma mass spectrometry is used for rapid and accurate iodide quantification, then measurement precision and speed are improved, but cost and expertise requirements increase substantially
Solution Approach 1:
The patent replaces expensive, sophisticated mass spectrometry equipment with inexpensive, disposable test tubes and reagent solutions. The copper(II) sulfate solution and urine sample are used in a single rapid test, eliminating the need for costly instrument maintenance, calibration, and specialized operator training while achieving sufficient detection speed for clinical decision-making
3Measurement precision
If ion selective electrode potential method is used for iodide determination, then measurement precision is improved, but ease of operation deteriorates due to complicated procedures and significant costs
Solution Approach 1:
The patent replaces the mechanical and electronic measurement system of ion selective electrodes with a simple chemical colorimetric reaction. Instead of measuring electrical potential with sensitive equipment, the method uses visual observation of color change in the copper(II) sulfate reaction, making the procedure simple enough for home use while maintaining adequate measurement precision
Solution Approach 2:
The patent enables the detection system to serve itself by using the inherent color properties of the copper(II) sulfate reaction with iodide ions. The reaction produces a visible color change that serves as its own indicator, eliminating the need for external power sources, electronic detectors, or complex calibration procedures required by electrode methods
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
Enables rapid, low-cost, and accessible determination of iodide ion levels in urine, suitable for home use, providing a quick assessment of iodine deficiency without specialized equipment or training.
Implementation Method 1
adding at least one drop of aqueous solution of a metal ion to the liquid sample of step a) wherein the metal ions selectively precipitate with iodide ion under normal conditions
Data Source
AI summary
The invention relates to a method and kit for quick and low-cost determination of the iodide ion content, which can be used not only to detect the possible iodine deficient conditions but also to estimate the iodide ion concentration of aqueous solutions. The present invention relates to a method for the determination of iodide ions in an aqueous solution, comprising the steps of: a) providing a liquid sample for which iodide ion concentration has to be determined, b) adding at least one drop of aqueous solution of metal ion to the liquid sample of step a) wherein the metal ions selectively precipitate with iodide ion under normal conditions; c) shaking the liquid sample of step b) and waiting for 1 to 5 minutes, preferably 3 minutes; d) repeating steps b) and c) until the precipitation is clearly visible to the naked eye in the test solution; e) recording and summing up the number of drops; and f) determining the amount of iodide ions based on the number of drops. The present invention further relates to a kit for determination of iodide ions in an aqueous solution. The kit according to the invention comprises a sample vessel, a vessel equipped with a dropper wherein the said vessel contains a metal salt solution which selectively precipitates with iodide ion content under normal conditions and an instruction for describing the method of determining the iodide ions in aqueous solution.