TRACEABLE NUCLEIC ACID MARKED FERTILIZER
The invention pertains to a traceable fertilizer product marked with a nucleic acid marker. The invention further provides for a method of marking a fertilizer product with a nucleic acid marker. In addition, the invention teaches a method of using a nucleic acid marked fertilizer product to identify and validate the origin or authenticity of said fertilizer product and to perform quantitative analysis on the fertilizer product to determine if said fertilizer product has been adulterated, diluted and/or counterfeited.
1 . A method of making a nucleic acid tagged fertilizer, said method comprising:
contacting a nucleic acid taggant with a fertilizer coating to produce a nucleic acid tagged fertilizer coating; and
adding the nucleic acid tagged fertilizer coating to a fertilizer to form a nucleic acid tagged fertilizer,
wherein the fertilizer is pelletized.
2 . The method of claim 1 , wherein the fertilizer coating is an anti-caking agent.
3 . The method of claim 2 , wherein the anti-caking agent comprises clay, talc, chalk, petroleum oils, waxes, polyalcohol, fatty amines, cationic surfactants based on fatty amines, alkyl-aryl sulphonates, mineral oils, alkyl phosphoric esters, paraffins, paraffin oil, and combinations thereof.
4 . The method of claim 3 , wherein the anti-caking agent comprises a fatty amine.
5 . The method of claim 1 , wherein the adding comprises tumble coating.
6 . The method of claim 1 , wherein the nucleic acid taggant is present at the level of about 0.1 nanograms to 25 micrograms per kilogram of fertilizer coating.
7 . The method of claim 1 , wherein the nucleic acid taggant is present at the level of about 5 micrograms per ton of fertilizer.
8 . A method of making a nucleic acid tagged fertilizer, comprising:
contacting a nucleic acid taggant, one or more antioxidants, and a wetting agent with a ferrous compound to produce a nucleic acid tagged ferrous compound; and
adding the nucleic acid tagged ferrous compound to a fertilizer coating to form a nucleic acid tagged fertilizer.
9 . The method of claim 8 , wherein the ferrous compound comprises iron, nickel, cobalt, or alloys thereof.
10 . The method of claim 9 , wherein the ferrous compound is ferrite.
11 . The method of claim 10 , wherein the ferrite is coated with a UV fluorescent dye.
12 . The method of claim 8 , wherein the nucleic acid tagged ferrous compound is present in about 0.1 μg to about 10 μg per ton of fertilizer.
13 . The method of claim 8 , wherein the one or more antioxidants are selected from the group consisting of sodium ferulate, EDTA, EDTA tetrasodium dehydrate, and combinations thereof.
14 . The method of claim 8 , wherein the wetting agent is selected from the group consisting of octylphenoxypolyethoxyethanol, sorbitan monolaurate, sorbitan monooleate, polyethylene glycol sorbitan monolaurate, sorbitane trioleate, polyethylene glycol 400, and combinations thereof.
15 . The method of claim 8 , wherein the ratio of wetting agent to ferrous compound is about 2:1.
16 . The method of claim 8 , wherein the fertilizer is powdered or pelletized.
17 . The method of claim 16 , wherein the fertilizer is pelletized and the nucleic acid tagged ferrous compound is combined with a fertilizer coating before being added to the pelletized fertilizer.
18 . The method of claim 17 , wherein the fertilizer coating is an anti-caking agent selected from the group consisting of clay, talc, chalk, petroleum oils, waxes, polyalcohol, fatty amines, cationic surfactants based on fatty amines, alkyl-aryl sulphonates, mineral oils, alkyl phosphoric esters, paraffins, paraffin oil, and combinations thereof.
19 . The method of claim 16 , wherein the fertilizer is pelletized and the adding comprises tumble coating.
20 . The method of claim 8 , wherein the nucleic acid taggant is a DNA taggant.
21 . The method of claim 8 , wherein the ferrous compound comprises particles of about 1 nanometer to about 500 microns.
22 . The method of claim 16 , wherein the fertilizer is powdered.
23 . A fertilizer composition comprising:
fertilizer and a nucleic acid tagged ferrite wherein the ferrite is present in about 0.1 μg to about 10 μg per ton of fertilizer.
24 . The fertilizer composition of claim 23 , wherein the nucleic acid tagged ferrite is DNA tagged ferrite.
25 . The fertilizer composition of claim 23 , wherein the fertilizer is pelletized and coated with an anti-caking agent containing the nucleic acid tagged ferrite.