QLA Sampling Cannula
All pictures shown are for illustration purpose only. Actual product may vary.
QLA offers traditional manual and automated sampling cannula for most dissolution baths. In addition to “traditional” cannula, QLA offers an extensive selection of “innovative”, QLA designed cannula. These cannula include peek cannula, improved filter housing cannula and a low cost cannula which offers significant cost savings without sacrificing quality
Features
Sampling Position - The sampling position is important particularly for tests with baskets as there can be a concentration profile between the bottom of the vessel and the stirring element. The sampling position is different for 500mL and 900mL tests. This can create problems for equipment that uses ‘through the shaft’ sampling.
Cannula Length - Cannula vary in length: 4.75” (120 mm) is used for 900 mL, 7.75” (19 5mm) is used for 500 mL and extended lengths are normally used for ”through the head sampling” whereby the cannula passes through the drive head of the dissolution bath.
Cannula Material - The cannula are made from either stainless steel or PEEK so that they do not absorb or interfere with the active ingredient.
Stoppers - Cannula can be used with stoppers during manual sampling to ensure that the sample is always taken from the same depth. Stoppers are attached to the cannula and sit in a hole in the vessel cover. If these are to be used then it is important to get the stopper and cannula to match the vessel cover type. The range of self-tightening stoppers can be installed and positioned without the need for tools such as screwdrivers. See below for more details.
