A laboratory experiment measured polystyrene particles released from an instant-noodle container under controlled pH, temperature, and contact-time conditions.
Source details
Jiae Wang, Jieun Lee, Eilhann E. Kwon, Sanghyun Jeong. Heliyon. 2023.
DOI: 10.1016/j.heliyon.2023.e15787
Findings
A laboratory experiment measured polystyrene particles released from an instant-noodle container under controlled pH, temperature, and contact-time conditions.
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| Test condition | Reported result | Particle size context | Source location |
|---|---|---|---|
| 200 mL pH 9 aqueous solution; maintained at 100 °C for 6 h | 36 PS particles/container | Reported comparison bins: 10-100, 100-200, 200-300, >300 µm; predominantly 10-100 µm | PDF p. 3 §2.2; p. 4 §2.3.2; p. 6 Figure 3(a); p. 7 §3.1 |
Methods and scope
Microscopy with FTIR chemical mapping identified particles on the filter. Styrene measured by GC-MS is a separate chemical result. Procedure blanks were reported to contain no microplastics.
What this source can support
Supports material-specific release under the stated laboratory conditions. It does not establish a release rate for reusable household tubs or a human health effect.
One commercial container type, not generic reusable tubs. pH 9 at 100 °C for 6 h is an extreme experiment. Figure 3(c) at 8 h exceeds the 36 at 6 h; 36 must not be described as the experiment-wide maximum. Supplementary size-distribution figure not supplied. 0.2 µm filtration pore is not a validated submicron detection floor. No estimate of ingested dose or human health effect.
Related evidence
Plastic food storage · How microplastics are measured
Reported values and source locations
| Reported value | Measurement basis | Conditions and size context | Original document location |
|---|---|---|---|
| 36 PS particles/container | Mean; experiments repeated at least three times; corresponding SD not numerically extracted | 200 mL pH 9 aqueous solution; maintained at 100 °C for 6 h Reported comparison bins: 10-100, 100-200, 200-300, >300 µm; predominantly 10-100 µm | PDF p. 3 §2.2; p. 4 §2.3.2; p. 6 Figure 3(a); p. 7 §3.1 |
Source provenance
Primary PDF SHA-256: 88679f8d72dd3233e68230ed2c278da890a4ea6dd38d1b9189fe4c2afab7d635
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