What aspect makes syringes less effective in certain conditions?

The effectiveness of syringes can be significantly impacted when they are used on water containing suspended solids. In such cases, the presence of solid particles can create blockages or reduce the accuracy of the sample being collected. This is particularly problematic because suspended solids can interfere with the measurement or testing of the water quality, leading to incomplete or misleading results.

When syringes are used in environments with high concentrations of suspended solids, these particles can clog the needle or the opening of the syringe, making it difficult to draw an accurate sample. Furthermore, this blockage can lead to inconsistent samples, which is especially critical in water quality monitoring. It is essential for monitoring technicians to ensure that the sampling devices used are appropriate for the water conditions they are working in, and in situations where suspended solids are present, alternative methods or equipment may be more effective.