【求助】求助大神，177.2450中MDI和TMA的测试方法在哪能找到

应助达人

https://www.law.cornell.edu/cfr/text/21/177.2450

后面应该就是测试项目啊

extractive limitations under the corresponding extraction conditions:
(1) Distilled water at 250 °F for 2 hours: Not to exceed 0.01 milligram per square inch.
(2) Three percent acetic acid at 212 °F for 2 hours: Not to exceed 0.05 milligram per square inch.
(3) Fifty percent ethyl alcohol at 160 °F for 2 hours: Not to exceed 0.03 milligram per square inch.
(4) n-Heptane at 150 °F for 2 hours: Not to exceed 0.05 milligram per square inch.

忘了写是问Fda均聚pom甲醛含量方法，看英文只写了限制，没有写方法