KTA Endotoxin Assay Kit (Kinetic Turbidimetric Method)
Catalog Number
Catalog No. |
Description |
Sensitivity EU/ml |
KTA100TA |
BETMAT™ KTA Endotoxin Assay Kit (Kinetic Turbidimetric Method), 100 tests/kit |
0.01-10EU/ml |
KTA100TB |
0.005-5EU/ml |
|
KTA300TA |
BETMAT™ KTA Endotoxin Assay Kit (Kinetic Turbidimetric Method), 300 tests/kit |
0.01-10EU/ml |
KTA300TB |
0.005-5EU/ml |
|
KTA400TA |
BETMAT™ KTA Endotoxin Assay Kit (Kinetic Turbidimetric Method), 400 tests/kit |
0.01-10EU/ml |
KTA400TB |
0.005-5EU/ml |
Product Features
Key Features of Kinetic Turbidimetric LAL Assay for Quantitative Endotoxin Detection
The kinetic turbidimetric LAL assay stands out for quantitative endotoxin detection with distinct advantages. It boasts high sensitivity, with a minimum detection limit down to 0.01 EU/mL, enabling precise quantification even at ultra-low endotoxin levels. The assay completes reactions in approximately 1 hour, balancing speed and accuracy for efficient workflow integration.
A major strength is its robust anti-interference capability. It mitigates false positives from β-D-glucan and protein binding, complying with USP <1085> standards for interference control. This ensures reliable results for complex samples like biologics and dialysates.
Automation compatibility is another key feature, seamlessly integrating with temperature-controlled microplate readers (340nm) for high-throughput testing. Its wide application scope covers water samples, large-volume injections, and hemodialysis fluids, offering cost-effectiveness for bulk detection. The quantitative range and linearity support regulatory compliance, making it indispensable for pharmaceutical and clinical endotoxin monitoring.
Applications
Applications of Kinetic Turbidimetric LAL Assay for Quantitative Endotoxin Detection
The kinetic turbidimetric LAL assay is widely applied in pharmaceutical, clinical, and industrial fields for reliable endotoxin quantification. In biopharmaceuticals, it tests monoclonal antibodies, recombinant proteins, and vaccines, ensuring endotoxin levels meet pharmacopeial limits (e.g., USP <85>). Its high sensitivity (0.005EU/ml ) suits cell therapy products, where even trace endotoxins risk adverse reactions.
It also serves industrial quality control, such as testing reverse osmosis membrane filtrates in water treatment and evaluating endotoxin removal efficiency in pharmaceutical manufacturing processes. Its automation compatibility enables high-throughput analysis, making it essential for large-scale production lines. Across sectors, its anti-interference ability ensures accurate results in complex matrices, underpinning regulatory compliance and product safety.
Technical Information
Technical Overview of the Kinetic Turbidimetric LAL Assay for Endotoxin Detection
The kinetic turbidimetric Limulus Amebocyte Lysate (LAL) assay stands as a sophisticated quantitative method for endotoxin detection, leveraging the conserved coagulation cascade of horseshoe crab hemolymph. This technique has gained widespread adoption in pharmaceutical, medical device, and clinical diagnostics due to its high sensitivity, automation compatibility, and broad dynamic range.
Core Principle
At the heart of the assay lies the endotoxin-induced gelation of LAL. Endotoxins trigger activation of the LAL coagulation pathway, initiating a series of enzymatic reactions that culminate in the formation of an insoluble gel. The kinetic turbidimetric method monitors this process by measuring changes in light transmittance through the reaction mixture. A critical parameter, gelation time (Tg), is defined as the time required for transmittance to decrease to a predefined threshold (typically 92% of initial intensity). Endotoxin concentration is quantified using a log-log relationship between Tg and known standards—lower endotoxin levels result in longer gelation times, while higher concentrations accelerate the reaction kinetics .
Key Technical Specifications
The assay exhibits exceptional sensitivity, with a minimum detection limit of 0.01 endotoxin units EU/mL and a quantitative range spanning 0.005–5 EU/mL. Reactions are standardized at 37°C, the optimal temperature for LAL enzyme activity . Specialized optical detection systems enable simultaneous analysis of multiple samples, with automated Tg determination eliminating subjective visual judgment associated with traditional gel-clot methods . Notably, inherent turbidity in samples (that remains stable during measurement) does not interfere with results, as the assay relies on relative changes in transmittance rather than absolute values .
Regulatory and Quality Compliance
The kinetic turbidimetric method is formally recognized in global regulatory frameworks, including FDA guidelines and pharmacopeial standards (USP, EP) . This compliance ensures its suitability for GMP (Good Manufacturing Practice) environments, where endotoxin testing is critical for product safety. The method’s specificity can be enhanced through formulation adjustments (e.g., incorporation of endotoxin-specific stabilizers), further reducing the risk of false-positive results from non-endotoxin activators.
In summary, the kinetic turbidimetric LAL assay represents a robust, quantitative solution for endotoxin monitoring. Its combination of sensitivity, automation, and regulatory acceptance makes it an indispensable tool in quality control and clinical diagnostics, supporting the safe development and use of medical products worldwide.