Table 2.

Absolute and relative recoveries (%) for water bath temperatures

Compound	Water bath temperature
	80 °C	83 °C	85 °C	90 °C	100 °C
Acetaminophen	101.7	106.8	103.9	102.6	94.9
Acetaminophen-d4	99.9	98.8	98.2	92.1	101.3
Caffeine	105.8	97.3	91.4	100.3	91.9
Acetylsalicylic acid	11.1	22.8	55.1	30.7	21.6
Ibuprofen	110.5	96.9	90.9	99.3	65.9
Diclofenac	106.7	98.2	92.3	98.3	84.5