Overall recovery rate of spiked microplastics is similar to overall recovery rates reported elsewhere for alkaline reagents. Some individual recovery rates were lower while others were higher than reported by Karami et al(2017) for KOH digestions indicating general variability in microplastics recovery from environmental samples. While our recovery rate is lower than a desirable 100%, we attempted to recover particles from a range of polymers, categories and sizes, which may be more in line with environmental samples. Spiking particle size has been shown to affect recovery rates. Dehaut et al(2016) obtained a high recovery rate for PA fibres of 500 μm; however, Avio et al(2015) noted significantly lower recovery rates of microplastics <100 μm. In line with this, a study of microplastics recovery from sediments recovered 99.7% of large microplastics (2000–5000 μm), but only 39.8% of particles ranging 40–309 μm. The spiking particles used in our study potentially covered a large portion of the microplastics range (≥63 μm). Some of the microplastics created for this experiment were prone to stick to jars and equipment despite copious rinsing. This issue was also observed by others with environmental samples. Recoveries from spiked tissue samples and water controls were similar.
Overall recovery rate of spiked microplastics is similar to overall recovery rates reported elsewhere for alkaline reagents. Some individual recovery rates were lower while others were higher than reported by Karami et al(2017) for KOH digestions indicating general variability in microplastics recovery from environmental samples. While our recovery rate is lower than a desirable 100%, we attempted to recover particles from a range of polymers, categories and sizes, which may be more in line with environmental samples. Spiking particle size has been shown to affect recovery rates. Dehaut et al(2016) obtained a high recovery rate for PA fibres of 500 μm; however, Avio et al(2015) noted significantly lower recovery rates of microplastics <100 μm. In line with this, a study of microplastics recovery from sediments recovered 99.7% of large microplastics (2000–5000 μm), but only 39.8% of particles ranging 40–309 μm. The spiking particles used in our study potentially covered a large portion of the microplastics range (≥63 μm). Some of the microplastics created for this experiment were prone to stick to jars and equipment despite copious rinsing. This issue was also observed by others with environmental samples. Recoveries from spiked tissue samples and water controls were similar.
正在翻譯中..
