New Model of Food Supply Chain Finance Based on the Internet of Things and Blockchain

Table 2

Pollutant limit index.

Project		Index
Lead content (mg/kg)	≤	0.2
Cadmium content (mg/kg)	Corn, wheat, and their products ≤	0.1
	Rice, rice ≤	0.2
Mercury content (mg/kg)	≤	0.02
Arsenic content (mg/kg)	Corn, wheat, and their products ≤	0.5
Tin content (mg/kg)	≤	250
Chromium content (mg/kg)	≤	1.0
Benzopyrene content (μg/kg)	≤	5.0