Reflective Sample Holder for Non-Destructive Pharmaceutical Analysis
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Solution Overview
Problem
Current methods for analyzing pharmaceutical products, especially those in sterile packaging like syringes, require destructive sampling and specialized laboratories, compromising sterility and being impractical for immediate quality control before use or admixture.
Innovation Solution
A reflective sample holder with a diffusive mirror surface, manufactured using additive manufacturing techniques, allows for non-destructive transflection measurements via NIR or Raman spectroscopy, enabling identification and quantification of APIs like caffeine without compromising sterility or requiring specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If destructive sampling methods are used for analysis, then measurement precision is improved, but sterility is compromised and loss of substance occurs
Solution Approach 1:
The patent replaces mechanical destructive sampling with optical measurement methods (NIR and Raman spectroscopy). The sample holder enables non-contact optical analysis through the container wall, eliminating the need to breach sterility for analysis while maintaining measurement capability.
Solution Approach 2:
The sample holder acts as an intermediary device that enables optical measurement without direct contact with the sample. The holder includes optical elements and a container interface that allows light to pass through the container wall, serving as a mediator between the measurement system and the sterile sample.
2Measurement precision
If specialized laboratory equipment is used for analysis, then measurement precision is improved, but device complexity and loss of time increase
Solution Approach 1:
The sample holder is designed to work with standard NIR and Raman spectrophotometers that are already present in many laboratories, making the system universally applicable without requiring specialized equipment. The holder adapts existing instruments for pharmaceutical analysis.
Solution Approach 2:
The sample holder is pre-configured with optical elements and geometric features that optimize the measurement setup before analysis begins. This preliminary arrangement eliminates the need for complex in-situ calibration and setup during actual measurement.
3Measurement precision
If traditional sampling methods are used, then measurement precision is improved, but productivity decreases due to destructive analysis
Solution Approach 1:
The sample holder enables continuous, non-destructive monitoring of pharmaceutical products. Multiple measurements can be taken sequentially without consuming the sample, allowing for continuous quality verification during storage, transport, or before administration.
Solution Approach 2:
The system allows the pharmaceutical product to serve itself by enabling analysis of the intact container and contents without requiring external destructive sampling. The product's own container becomes the measurement window.
4Object-affected harmful factors
If non-destructive measurement methods are used, then sterility is preserved, but measurement precision deteriorates
Solution Approach 1:
The sample holder introduces localized optical enhancement features at specific positions to improve measurement quality. The geometric configuration and optical element placement are optimized to concentrate and direct light through the container wall, enhancing signal strength without compromising sterility.
Solution Approach 2:
The system optimizes measurement parameters by adjusting light source characteristics, detection settings, and geometric configuration within the sample holder. These parameter optimizations enable high-precision measurements through the non-contact interface.
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 provides higher quality and reproducible measurement results, simplifies and cheapens the characterization of pharmaceuticals, ensuring sterility and reliability, and allows for faster analysis of APIs in their primary packaging.
Implementation Method 1
When a mirror is placed behind a sample, the light transmitted through the sample is reflected back through the sample and into a diffuse reflectance probe used as detector
Implementation Method 2
additive manufacturing techniques could be adapted for manufacturing of different sample holders comprising a sample receiving chamber
Data Source
AI summary
A sample holder and method is disclosed. In one example, the sample holder is for spectrophotometric measurements of a sample using a transflection technique. The sample holder comprises a sample receiving chamber comprising a diffusive mirror, wherein a curvature of the diffusive mirror is adapted to a curvature of a surface of the sample and/or adapted to a curvature of a surface of a container comprising the sample. Further, a sample holder for spectrophotometric measurements of a sample using a transmission technique is disclosed. The sample holder comprises a hollow light guiding channel, wherein an inner wall of the hollow light guiding channel is covered by a smooth reflective coating and is configured to encase at least partially a tubular part of the sample or of a container containing the sample along a circumferential direction of the tubular part of the sample or of the container.