Manual Dissolution Sampling Cannula and Filter Set

What is the Manual Dissolution Sampling Cannula and Filter Set?

A manual sampling set consists of stainless steel cannulas, full-flow filters and syringes used to withdraw timed samples from dissolution vessels by hand. It is the lowest-cost option for occasional or single-time-point dissolution tests. It needs no software or power supply.

Overview

Manual sampling sets provide standardized cannula lengths and filters so that samples are taken from the compendial zone without disturbing the medium. Cannulas are 316 stainless steel, with lengths to fit standard vessels, and cannula holders mount to the dissolution head or bath. Full-flow filters of 10 µm polyethylene or 0.45 µm PVDF or PTFE are attached to the cannula tip to exclude undissolved particles and stop dissolution in the aliquot. Syringes of 5–20 mL draw the sample, and additional 0.45 µm syringe filters are used when analysis requires clarified solutions. Filter compatibility, adsorption and first-portion discard volume should be validated for each drug. This option requires analysts to be present at each time point and operator timing introduces variability, so it is usually reserved for single-point QC, development work or as backup to automated samplers.

How does it work?

A sampling system places a filtered probe in the compendial sampling zone of each vessel and moves a defined volume of medium by syringe pump, peristaltic pump or vacuum to the destination. Valves select the channel, timers trigger sampling at preset times, and flush steps clear the lines. Probes are fitted with filters, typically 10 µm full-flow or 0.45 µm, which stop dissolution by removing undissolved particles. In-situ fibre-optic probes skip withdrawal entirely and measure absorbance in the vessel. Data such as time, volume and vial position are logged. Performance depends on timing accuracy, volume accuracy, dead volume, adsorption to tubing and filters, and the effect of the probe on hydrodynamics. Replacement of sampled volume with fresh medium can keep vessel volume constant.

What are the key features?

• 316 stainless steel cannulas with calibrated lengths
• Full-flow filters in 10 µm PE and 0.45 µm PVDF or PTFE
• Cannula holders for consistent sampling position
• Syringes of 5–20 mL with Luer connectors
• Compatible with USP Apparatus 1 and 2 vessels
• Low cost and no software required

What are the technical specifications?

A typical manual dissolution sampling cannula and filter set configuration offers cannula material of 316 stainless steel, cannula length of about 120–160 mm, filter types of 10 µm PE, 0.45 µm PVDF or PTFE, syringe volume of 5–20 mL, sampling zone of midway, ≥ 1 cm from wall and holder type of clamp or head-mounted. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Manual Dissolution Sampling Cannula and Filter Set is used in single-point QC, method development, backup for automated systems and teaching laboratories. Across the wider Sampling Systems class, laboratories also deploy it for dissolution profile automation, regulated QC testing and extended-release studies.

Which standards and certifications apply?

Relevant standards and methods include USP <711>, USP <1092>, Ph. Eur. 2.9.3, JP 6.10, ChP 0931, ASTM E2503 and 21 CFR Part 11. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Validate automated sampling against manual pulls during OQ and method transfer, checking timing, volume accuracy and carry-over. Clean and inspect probes and cannulas regularly, since blockage and film build-up affect recovery. Replace pump tubing and filters per schedule, and evaluate drug adsorption on tubing and filters. Keep cannula position within the compendial zone and avoid contact with paddles or baskets. Ensure software provides audit trail, user access control and time-stamped records. Include samplers in preventive maintenance and calibration programs alongside the dissolution tester.

How do I select the right Manual Dissolution Sampling Cannula and Filter Set?

Select manual sets for single-point tests, limited budgets, or as spares for automated samplers. Specify number of cannulas, filter materials and sizes, and compatibility with vessel geometry. Verify filter adsorption for your drug before routine use. Confirm cannula length against your vessel and head design before ordering.

How does it compare with other Sampling Systems variants?

Match the system to the number of time points, unattended operation needs and analytical method. Syringe-pump samplers give accurate aliquots and suit vial-based HPLC analysis. Peristaltic online systems suit continuous UV profiles and fraction collection. Fibre-optic probes give the fastest time resolution without withdrawal but need UV-active, non-interfering analytes. Media replacement is worth having when withdrawn volume exceeds a few percent of vessel volume. Manual kits suit single-point QC and backup. Key specifications are timing accuracy, volume accuracy, channel count, filter options, carry-over, compatibility with the existing tester and software data integrity. Validate against manual sampling before replacing it in a regulated method.