Qa3 understand the importance of representative sampling and the impact that incorrect sampling can have upon the integrity of the sample and subsequent data. Qa3 have strict sampling regimens to which they always adhere, in order to minimise contamination and ensure that the samples taken are as representative of the fluid in the line as possible. These involve flushing the sampling line and sample point including all valves and fixtures for an appropriate time period. In addition, it may also involve flushing the sampling vessels. It is our standard practise to take a number of samples spanning the sampling period available in order observe any trends in the concentration of the analyte(s) of interest.