Trace elements

Di-Sodium Zinc Ethylene Diamino Tetra Acetate (C 10 H 12 O 8 N 2 ZnNa 2 ) in Water Solution

EDTA is suspended in a quantity of distilled water at 50° C. and is stirred continuously. In small proportions firstly sodium hydroxide (NaOH) and then zinc oxide (ZnO) are added in sequence. The pH of the clear solution obtained is measured and brought to 7, if necessary, by either the addition of NaOH (if acid) or EDTA (if alkaline). More distilled water is added to bring the zinc concentration to a predetermined level, and the solution is subsequently filtered.

If 25.16 g zinc oxide, 90.37 g EDTA and 24.74 g NaOH are used and the total volume is 1 liter, the zinc concentration in the solution will be 20 mg/ml.

Di-Sodium Manganese Ethylene Diamino Tetra Acetate (C 10 H 12 O 8 N 2 MnNa 2 ) in Water Solution

The same method as under example 1 is used with the following variation:

Manganese carbonate (MnCO 3 .xH 2 O) is used in place of zinc oxide.

If 45.45 g manganese carbonate, 106.39 g EDTA and 29.12 g NaOH are used, and the total volume is 1 liter, the manganese concentration will be 20 mg/ml.

Di-Sodium Copper Ethylene Diamino Tetra Acetate (C 10 H 12 O 8 N 2 CuNa 2 ) in Water Solution

The same method as under Example 1 is followed but with the following variation:

Basic copper carbonate (CuCO 3 Cu(OH) 2 .H 2 O) is used in place of the zinc oxide.

If 18.81 g basic copper carbonate, 45.99 g EDTA and 12.59 g NaOH are used, and the total volume is 1 liter, then the copper concentration in the solution will be 10 mg/ml.

Mono-Sodium Chromium Diamino Tetra Acetate (C 10 H 12 O 8 N 2 CrNa) in Water Solution

The same method as under Example 1 is followed, but with the following variation:

Chromium tri-chloride hexahydrate (CrCl 3 .6H 2 O) is used in the place of zinc oxide.

If 25.62 g chromium tri-chloride hexahydrate, 31.59 g EDTA and 15.38 g sodium hydroxide are used and the total is 1 liter, the chromium concentration in the solution will be 5 mg/ml.

Sodium Selenite (Na 2 SeO 3 .H 2 O) Solution in Water

If 12.09 g sodium selenite is used and the total volume is 1 liter, the selenium concentration in the solution will be 5 mg/ml.

A Mixture of the Compounds of Examples 1 to 5

The method is a combination of the above methods under Examples 1, 2, 3, 4 and 5 and takes place as follows:

1. The zinc preparation as per Example 1 is prepared. 2. To this added (in the same container) the chemicals as used for Example 2 for the preparation of the manganese compound. 3. Then the chemicals used as under Example 3 for the preparation of the copper compound are added. 4. At this stage the pH is brought to 7 as described under Example 1 above. 5. Subsequently the chemicals used as under Example 4 for the preparation of the chromium compound are added. 6. Lastly the chemicals used as under Example 5 are added. 7. Finally the total volume is adapted by the addition of distilled water. 8. Filtration takes place.

If 25.16 g zinc oxide, 45.45 g manganese carbonate, 18.81 g basic copper carbonate, 25.62 g chromium tri-chloride hexahydrate, 12.09 g sodium selenite, 274.34 g EDTA and 81.83 g NaOH are used, and if the total volume is 1 liter, then the zinc concentration will be 20 mg/ml, the manganese concentration 20 mg/ml, copper concentration 10 mg/ml, the chromium concentration 5 mg/ml and the selenium concentration 5 mg/ml.

Tetra Sodium Molybdenum Tri-Oxide Ethylene Diamino Tetra Acetate (C 10 H 12 O 8 N 2 MoO 3 Na 4 ) in Water Solution

Molybdenum tri-oxide (MoO 3 ) is suspended at room temperature in a quantity of water and stirred continuously. In portions in sequence firstly sodium hydroxide (NaOH) and then EDTA are added. The pH of the clear solution obtained is measured and it is brought to 7 if required, by adding either NaOH (if acid) or EDTA (if alkaline). More distilled water is added to bring the molybdenum concentration to a pre-determined value. The pH is changed to 6 by the addition of concentrated HCl. Filtration takes place.

If 60.02 g MoO 3 , 66.71 g NaOH and 121.84 g EDTA are used and if the volume is 1 liter, then the molybdenum concentration will be 40 mg/ml.

In all of the above examples the order of mixing the chemicals may be changed to some extent without any influence on the products formed.

All of the above products can be obtained as solids by evaporation of the appropriate solutions.

All of the above-mentioned chemicals may be substituted by others, provided the substitute are used in equivalent quantities. The particulars are as follows:

1. The di-sodium salt of EDTA in place of EDTA acid. 2. Basic zinc carbonate (2ZnCO 3 .3Zn(OH) 2 ) or zinc hydroxide (Zn(OH) 2 ) in place of zinc oxide. 3. Manganese hydroxide (Mn(OH) 2 ) in place of manganese carbonate. 4. Cupric hydroxide (Cu(OH) 2 ) or cupric oxide (CuO) in place of basic copper carbonate. 5. Anhydrous chromium tri-chloride (CrCl 3 ) in place of chromium tri-chloride hexahydrate. 6. Sodium molybdate (Na 2 MoO 4 ) in place of molybdenum tri-oxide.