1. No category

Dedicated Analytical Solutions
FOSS KASTER LYS PÅ FØDEVARER
Jacob Riis Folkenberg, Senior Manager, FOSS Analytical A/S
Metrologidag, Dansk Industri, 18/5-2015
Dedicated Analytical Solutions
AGENDA

Hvad laver FOSS?

Spektroskopi og kemiske bindinger – hvordan virker det?

Spektrometer teknologier
 Monokromator
 Diode detector array (DDA)
 Fourier Transform spektroskopi (FTIR)

Fra spektrum til brugbar information
 Kaliberinger, standardisering og transferabilitet

Eksempler på applikationer
 MilkoScreen – kvalitetskontrol af råmælk i Indien
 ProFoss – in-line måling i procesanlæg
2
Dedicated Analytical Solutions
WHAT WE DO
FOSS provides rapid, reliable and dedicated analytical solutions for routine
control of quality and processing of agricultural, food, pharmaceutical and
chemical products.
3
Dedicated Analytical Solutions
OPTIK SPEKTROSKOPI
850 nm
10000 nm
IR (2.5 – 10 µm)
4
LW-NIR
(1100 – 2500 nm)
SW-NIR
(850 – 1100 nm)
Dedicated Analytical Solutions
NIR VERSUS IR IN FOOD SAMPLES
NIR
IR
Increasing wavelength
Large,
heterogeneous
samples (solids)
Increasing absorption strength and specificity
Increasing penetration depth
Increasing light scattering
5
Small,
homogeneous
samples
(liquids)
Dedicated Analytical Solutions
NIR VERSUS IR OPTICS
NIR
(800-2500 nm)
IR
(3 – 10 µm)
Light source
Strong
(Halogen lamp, 4000 K)
Weak
(Thermal source,  1100 K)
Detector
”Quantum” detectors
(Si, InGaAs)
Thermal detectors
(pyroelectric crystals)
Optical materials
Many – most glasses are transparent
Few – Ge, CaF2 , diamond
Light power budget
Tight – light attenuated by scattering, both in
reflection and transmission modes
Tight – sources weak and detectors half blind
General rule of spectroscopy:
Every photon is sacred, so the optimal
design is always required !!
6
Dedicated Analytical Solutions
PRE DISPERSIVE SCANNING
MONOCHROMATOR
•
•
•
•
•
Single Detector
Rotating Grating
Monochrome sample illumination
High spectral density (mW/nm)
Penetrates samples with OD  5
Example: Infratec Nova (grain analyser)
7
Dedicated Analytical Solutions
POST DISPERSIVE DETECTOR
DIODE ARRAY
•
•
•
•
•
Multiple Detectors
Fixed Grating
Polychrome sample illumination
Robust - no moving parts
Spectra taken simultaneously
Example: ProFoss (process analysis)
8
Dedicated Analytical Solutions
IR SPECTROSCOPY
Fourier transform IR spectroscopy (FTIR) is based on a Michelson interferometer
Fast spejl
Laser
d = 2L
Termisk
kilde
9
Kuvette
Laser detektor
Fourier
transform
Flytbart spejl
d
Spectrum
n
Dedicated Analytical Solutions
Sampling
Prøvepræsentation
Sub-sampling
10
FRA SPEKTRUM TIL
NYTTIG INFORMATION
Rådata
Spektral standardisering:
-Bølgelængde
-Absorbans mod reference
-Linearitet
Kalibrering på absorbans
spektrum:
-PLS / ANN model
-Robustificering
Prædiktion vises
på display
Dedicated Analytical Solutions
MILKOSCREEN
India has the largest milk production in the world,
with a very decentralized structure having >100.000
collection centers.
Quality control of raw milk in India with MilkoScreen:
- Fat & protein content
- Specific adulterants (fertilizers, added water, salt)
- Similarity to ”real milk”
MilkoScreen is based on cost optimized FTIR and
manual sample handling.
11
Dedicated Analytical Solutions
PROFOSS
In-line process control and optimization:
- Robust NIR-DDA technology
- Wrapped in IP69 and ATEX approved box
- Continuous measurements of protein, moisture, fat etc.
12