Optimized Nile Red Staining Protocol for Microplastics ≤ 2 µm Detection

A PDF document presents a systematically optimized filtration and Nile Red staining protocol for detecting microplastics smaller than 5 µm, with emphasis on particles ≤ 2 µm. The study, authored by Uroosa and last updated in April 2026, demonstrates the protocol's effectiveness on polystyrene and polyethylene particles while confirming dye specificity against inorganic controls. This cost-effective method is designed for labs with lower resources and for initial screening of natural samples.

Use Cases

• Benchmarking fluorescence-based detection methods based on the described staining parameters for particles ≤ 2 µm.
• Developing initial screening protocols for environmental samples based on the described cost-effective filtration and staining workflow.
• Optimizing signal-to-noise ratios in microplastic analysis based on the described formalin fixation treatment.
• Assessing dye specificity for microplastics against inorganic materials based on the described control experiments.

Strengths

• Protocol is optimized for detecting particles as small as 1 µm and 2 µm, a key challenge in microplastic analysis.
• Demonstrates strong and consistent signals for polystyrene and polyethylene particles under the optimized conditions.
• Shows improved particle brightness and signal-to-noise ratio with formalin fixation without compromising selectivity.
• Released under a permissive CC-BY-4.0 license, allowing for broad reuse and adaptation.

Limitations

• The dataset is a 413.3 KB PDF document, which is a very small file containing methodological description rather than raw experimental data.
• Row count and column-level documentation are absent; the content is a research protocol, not a tabular dataset.
• Freshness should be verified; the last update date is listed as 2026-04-23, which is a future date at the time of this description.

Provenance

Source

figshare, authored by Uroosa.

Collection Method

Systematic laboratory optimization of filtration conditions and staining parameters.

Time Range

The protocol's development timeframe is not specified.

Freshness

Last updated 2026-04-23 04:15:22; freshness should be verified due to the future date.

Geography

Geographic scope of the method's application is not specified.