High Voltage Leak Detection
High voltage leak detection (HVLD) is a deterministic, non-destructive container closure integrity test method that is used to in liquid-filled, non-conductive pharmaceutical packaging. It’s one of the most sensitive methods available for evaluating container closure integrity in products such as prefilled syringes, vials, cartridges, ampoules, and blow-fill-seal containers.
Regulatory agencies increasingly encourage the use of deterministic CCIT methods when appropriate because they provide objective, quantitative measurements of package integrity.
HVLD is recognized within industry guidance as an accepted deterministic technology for evaluating container closure integrity, particularly for liquid-filled parenteral products.
How High Voltage Leak Detection Works
HVLD operates on a simple principle: pharmaceutical liquids typically conduct electricity, while intact glass or plastic packaging does not.
During testing, the filled container passes between electrodes where a controlled electrical field is applied. If the container has a crack, pinhole, seal defect, or other breach that creates an electrical pathway, the instrument detects a measurable change in current. This change indicates a loss of container closure integrity.
Because the package remains intact after testing, HVLD allows manufacturers to evaluate container integrity without sacrificing product, making it valuable during development studies, process validation, and routine quality monitoring.
Frequently asked questions
What types of packaging can be tested using HVLD?
HVLD is commonly used for prefilled syringes, vials, BFS containers, ampoules, cartridges, and other liquid-filled pharmaceutical containers made from glass or plastic.
What is High Voltage Leak Detection (HVLD)?
HVLD is a non-destructive, deterministic container closure integrity test that detects leaks in liquid-filled pharmaceutical packaging by measuring changes in electrical current caused by a leak path.
Can HVLD be used on lyophilized products?
Generally no. HVLD requires a conductive liquid inside the package, making it best suited for liquid-filled products.
Why choose HVLD instead of dye ingress?
HVLD is a deterministic method that provides objective measurements and generally offers greater sensitivity with less operator variability than probabilistic methods like dye ingress.
How does HVLD compare to Vacuum Decay or Pressure Decay?
HVLD, Vacuum Decay (ASTM F2338), Pressure Decay (ASTM E2930), Helium Leak Detection (ASTM F2391), and Laser-Based Headspace Gas Analysis (HGA) are all deterministic container closure integrity testing methods. The most appropriate technology depends on the package design, product characteristics, container material, and study objectives.