Patent ID: 11968983
Assignee: HUBEI INSTITUTE OF TOBACCO SCIENCE
Field: Basic materials chemistry (Chemistry)
Classification: CPC A | IPC A

Claim 2:
3. A method for reducing carcinogenic ingredients in flue-cured tobacco leaves, comprising a step of spraying a tobacco leaf foliar spraying substance, 5 days before harvesting during the tobacco leaf maturation stage;
wherein the tobacco leaf foliar spraying substance is for reducing harmful ingredients in cheroot, wherein the tobacco leaf foliar spraying substance comprises a lotus leaf extract, and the harmful chemical ingredients comprise N-nitrosonornicotine, 4-(N-methyl-nitrosamine)-1-(3-pyridinyl)-1-butanone, N-nitrosoanabasine and N-nitrosoanatabine, the lotus leaf extract is prepared by the following method:
mashing freshly harvested lotus leaves with clean water in a mass ratio of 1:3 in tissue masher, injecting the mixed suspension after mashing into a circular ultrasonic extraction machine, wherein operation parameters for ultrasonic extraction are as follows: an extraction temperature is room temperature of 25±5° C., ultrasonic power is 1000W, a rotation speed is 1200 rpm, and extraction time is 30±5 min; and then after ultrasonic treatment, filtering, and diluting filtrate;
wherein the tobacco leaf foliar spraying substance comprises the following components in percentage by weight: 0.001-0.015% of pinoresinol, 0.001-0.01% of epiterpineol, 0.001-0.015% of isolariciresinol, 0.001-0.01% of ryegrass lactone, 0.001-0.015% of obacunone, 0.001-0.02% of 4,5-dihydroblumel A, 0.001-0.015% of 3-oxo-α-ionoland 0.001-0.015% of dehydrovomifoliol.