What type of container must be used to collect fluoride samples?

Fluoride samples for analysis must be collected in plastic containers because plastic is inert to fluoride and does not interfere with the analysis. Glass, while often used for many types of laboratory samples, can react with certain fluoride ions, potentially skewing the results of the test. Metal containers can also react with fluoride, leading to contamination or loss of the analyte due to adsorption or chemical reactions. Ceramic materials are similarly unsuitable due to their potential to leach substances into the sample or adsorb fluoride.

Using the appropriate container is essential for maintaining the integrity of the sample and ensuring accurate and reliable results during analysis. Therefore, plastic containers are specified for fluoride sampling to prevent any risk of interaction that could compromise data quality.