Lab Trial with liquid Microtracer

Step 5. Appearance of liquid Microtracer retrieved from the feed and collec-ted on the bottom of plastic container (Nd-magnet is attached underneath)

Lab Trial with liquid Microtracer

Step 6. Transfer of dispersion of collected liquid Microtracer in aqueous surfactant solution from the plastic container, to the beaker with ABC-coated Nd magnet on the bottom

Lab Trial with liquid Microtracer

Step 7.Transfer of ABC-coated Nd-magnet covered with liquid Microtracer from the beaker

Lab Trial with liquid Microtracer

Step 8. Transfer of ABC- coated Nd-magnet with attached liquid mic-rotracer into vial for treatment with hydrochloric acid solution

Lab Trial with liquid Microtracer

Step 9.Analytical determination of Co(2+) concentration in retrieved portion of liquid tracer

Stages: 1. Dissolving attached liquid tracer in HCl ; 2. Addition diethylamine and ammonium thiocyanate in DMSO;

3. Determination of optical density at 667 nm

Calibration curve for determination of Co(2+) in Liquid Microtracer

R2 = 0.9985

0

0.1

0.2

0.3

0.4

0 50 100

Concentration of Co (2+) , mg/1000 ml

Ab

so

rba

nc

e a

t 6

67

n

m

Absorbance spectrum of analysed sample

0

0.05

0.1

0.15

0.2

550 600 650 700 750

Wavelength, nm

Op

tical

den

sit

y

Field trial with liquid Microtracer

Validating mixing for liquid feed (500 kg Trial with liquid pig feed manufacturer –Micro Tracers Services, Europe)

Field trial with liquid Microtracer

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