Table 1.

Detection frequencies (DF, %) and concentrations (ng/g) of phthalates in mask samples (n = 56).

Compound	Mean	Median	IQRa	Range	DF
DMP	22.8	17.3	18.8	< MDLb-126	76.8
DEP	76.2	12.0	61.4	< MDL-1780	53.6
DiBP	401	321	347	< MDL-1450	98.2
DBP	523	322	246	< MDL-4780	98.2
DMEP	9.4	< MDL	< MDL	< MDL-252	10.7
DPP	47.4	36.8	50.3	< MDL-149	80.4
DHXP	131	< MDL	41.6	< MDL-1530	44.6
DEHP	1590	590	789	37.4–36,700	100
DPhP	93.3	85.2	77.6	< MDL-290	94.6
DNOP	93.8	7.1	43.4	< MDL-1960	50.0
DNP	158	37.0	226	< MDL-1500	57.1
Total	3150	1950	2620	115–37,700

^aIQR represents interquartile range.

^bMDL represents method detection limit.