Table 1. Levels of NP detected in the organs or tissues of animals.

Tissue	NP concentration	Exposure dosage	Gavage period	Reference
Liver, rat	9.015–19.953 μg/mL	50, 100, 200 mg/kg	15 days	Luo et al. (2015)
Liver, rat	0.061–3.308 μg/g	50, 100, 200 mg/kg	3 days	Xiao, Li & Wu (2004)
Kidney, rat	0.031–2.723 μg/g	50, 100, 200 mg/kg	3 days	Xiao, Li & Wu (2004)
Heart, rat	0.022–0.285 μg/g	50, 100, 200 mg/kg	3 days	Xiao, Li & Wu (2004)
Brain, rat	0.029–0.305 μg/g	50, 100, 200 mg/kg	3 days	Xiao, Li & Wu (2004)
Testis, rat	0.71–5.48 μg/mL	5, 25, 125 μg/kg	35 days	Kazemi et al. (2016)
Pancreas, rat	2,045.0 ± 130.1 μg/L	200 mg/kg	60 days	Yang et al. (2017)
Serum, F1 rat	2.48 ± 0.32 ng/mL	25 μg/kg	15 days (F0)	Zhang et al. (2018)
Brain, mouse	4.94–5.16 ng/g	–	–	Sun et al. (2016)
Heart, mouse	16.28 ng/g	–	–	Sun et al. (2016)
Liver, mouse	2.24–2.94 ng/g	–	–	Sun et al. (2016)
Subcutaneous adipose tissue, human	9.8–266.5 ng/g	–	–	Ferrara et al. (2011)
Cyprinus carp meat	1.92 ± 0.33	–	–	Mortazavi et al. (2013)
Liver of cyprinus carp	3.21 ± 0.46	–	–	Mortazavi et al. (2013)
Fish meat	20–100 ng/g	–	–	Shao et al. (2005)
Crucian carp meat	0.5–15 ng/g	–	–	Liu et al. (2011)
Nile tilapia meat	0.031–0.053 μg/g	500 μg/L	10 days	Ismail & Mahboub (2016)
Liver of red mullet	33.7 ± 9.9 ng/g	–	–	Errico et al. (2017)
Red mullet meat	18.6 ± 3.5 ng/g	–	–	Errico et al. (2017)