DE829514C - Method for determining the degree of contamination of milk - Google Patents
Method for determining the degree of contamination of milkInfo
- Publication number
- DE829514C DE829514C DEH3284A DEH0003284A DE829514C DE 829514 C DE829514 C DE 829514C DE H3284 A DEH3284 A DE H3284A DE H0003284 A DEH0003284 A DE H0003284A DE 829514 C DE829514 C DE 829514C
- Authority
- DE
- Germany
- Prior art keywords
- milk
- determining
- degree
- contamination
- filter material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/04—Dairy products
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
Verfahren zur Ermittlung des Verschmutzungsgrades von Milch Die Erfindung betrifft ein Verfahren zur Ermittlung des Verschmutzungsgrades von Milch.Method for determining the degree of contamination of milk The invention relates to a method for determining the degree of contamination of milk.
Es ist schon vorgeschlagen worden, den Verschmutzungsgrad von Milch dadurch zu ermitteln, daß die Milch gefiltert und die Dichte des Filterrückstandes auf photometrischem Wege gemessen wird. Man bedient sich dabei bekannter Lichtmeßgeräte mit photoelektrischer Zelle und Anzeigegerät, mißt mit deren Hilfe zunächst die Lichtdurchlässigkeit eines unverschmutzten Teiles des für den Durchsatz der Milchprobe benutzten Filterstoffes, reguliert den Zeiger des Anzeigegerätes auf eine bestimmte Anfangsstellung ein und mißt anschließend die Lichtdurchlässigkeit des Filterrückstandes nach Filtrierung der zu prüfenden Milch. It has been suggested to measure the pollution level of milk by determining that the milk has been filtered and the density of the filter residue is measured by photometric means. Well-known light meters are used with photoelectric cell and display device, with their help first measures the Light transmission of an unpolluted part of the for the throughput of the milk sample filter material used, regulates the pointer of the display device to a specific one Start position and then measure the light transmission of the filter residue after filtering the milk to be tested.
Dieses Verfallrell stößt in der Praxis insofern auf Schwierigkeiten, weil der Einfluß der Lichtdurchlässigkeit der sauberen Milch in einem solchen Ausmaße in die Meßwerte eingeht, daß der Schmutzgehalt nicht genau genug bestimmbar ist, weil mit zunehmender Dichte des Filterrückstandes, d. h. der Schmutzmenge, der Verschmutzungsgrad auf dem Zeigerinstrument nicht mehr deutlich zur Anzeige gelangt. Versuche, die Anzeigegenauigkeit durch elektrische Kompensation zu erhöhen, führten zu keinem befriedigenden Ergebnis. In practice, this decline encounters difficulties insofar as because the influence of the translucency of clean milk to such an extent is included in the measured values that the dirt content cannot be determined precisely enough, because with increasing density of the filter residue, d. H. the amount of dirt, the degree of pollution is no longer clearly displayed on the pointer instrument. Try that Increasing display accuracy through electrical compensation did not lead to any satisfactory result.
Die Erfindung geht daher einen anderen, einfacheren Weg, um den geschilderten Nachteilen zu begegnen und um objektive und genaue Bestimmung des Verschmutzungsgrades der Milch zu ermoglichen. Sie besteht darin, daß der Filterstoff vor Beginn der eigentlichen Meßuntersuchung mit sauberer Milch getränkt, und die photometrische Meßvorrichtung dann auf die Lichtdurchlässigkeit des dermaßen getränkten Filterstoffes einreguliert wird; wonach die Meßuntersuchung erfolgt. The invention is therefore a different, simpler way of the described To counter disadvantages and to objectively and precisely determine the degree of pollution of the milk. It consists in the fact that the filter material before the start of actual measurement examination soaked with clean milk, and the photometric Measuring device then on the light permeability of the filter material soaked in this way is adjusted; after which the measurement examination takes place.
Wie schon vorgeschlagen, bedient man sich zur Bestimmung des Verschmutzungsgrades von Milch eines Lichtmeßgerätes bekannter Bauart mit photoelektrischer Zelle und Anzeigeskala für den erzeugten Photostrom, die auf die verschiedenen Verschmutzungsgrade geeicht ist. Gegenüber der Photozelle- ist eine in einem Gehäuse eigeschlossene Lichtquelle angeordnet, zwischen die und die Photozelle der zu durchleuchtende Filterstoff eingelegt werden kann. Die Bauart des Gerätes im einzelnen ist von untergeordneter Bedeutung. As already suggested, use is made to determine the degree of soiling of milk of a light meter of known type with photoelectric cell and Display scale for the generated photocurrent, which corresponds to the various degrees of pollution is calibrated. Opposite the photocell one is enclosed in a housing Light source arranged, between which and the photocell the filter material to be transilluminated can be inserted. The design of the device in detail is of minor importance Meaning.
Bevor nun die eigentliche Messung beginnt, wird der Filterstoff, der z. B. aus Zellstoff oder Watte bestehen kann, mit sauberer (zentrifugierter) Milch getränkt und erhält dadurch eine bestimmte Lichtdurchlässigkeit, die von jetzt ab die objektive Grunddurchlässigkeit ist und auf die der Zeiger des Anzeigeinstruments durch Verändern seines Widerstandes, z. B. auf die Nullstellung, eingeregelt wird. Before the actual measurement begins, the filter material, the z. B. can consist of cellulose or cotton wool, with clean (centrifuged) Soaked in milk and thereby receives a certain transparency that from now on ab is the objective basic permeability and to that of the pointer of the indicating instrument by changing its resistance, e.g. B. to the zero position is regulated.
Damit sind für die folgende Messung der (verschmutzten) Milchprobe alle Einflüsse der Lichtdurchlässigkeit der sauberen Milch ausgeschlossen.This is for the following measurement of the (contaminated) milk sample all influences of the light transmission of the clean milk excluded.
E,s werden saubere und genau differenzierte Ausschläge des Zeigerinstrumentes erzielt, die eine objektive Schmutzgehaltsbestimmung ermöglichen.E, s are clean and precisely differentiated deflections of the pointer instrument achieved, which enable an objective determination of the dirt content.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH3284A DE829514C (en) | 1950-06-06 | 1950-06-06 | Method for determining the degree of contamination of milk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH3284A DE829514C (en) | 1950-06-06 | 1950-06-06 | Method for determining the degree of contamination of milk |
Publications (1)
Publication Number | Publication Date |
---|---|
DE829514C true DE829514C (en) | 1952-01-28 |
Family
ID=7143524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH3284A Expired DE829514C (en) | 1950-06-06 | 1950-06-06 | Method for determining the degree of contamination of milk |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE829514C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE927476C (en) * | 1950-06-20 | 1955-05-09 | Georg Dr Roeder | Method for the determination of germ counts, leukocyte counts and the like Like. In addition to the device for carrying out the method |
-
1950
- 1950-06-06 DE DEH3284A patent/DE829514C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE927476C (en) * | 1950-06-20 | 1955-05-09 | Georg Dr Roeder | Method for the determination of germ counts, leukocyte counts and the like Like. In addition to the device for carrying out the method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3346024A1 (en) | OPTICAL SENSOR | |
DE2906790B2 (en) | Method and arrangement for determining the alcohol concentration in the blood by measuring the alcohol concentration and the humidity in the air we breathe | |
DE2937476A1 (en) | DEVICE FOR MEASURING THE SURFACE TENSION | |
DE829514C (en) | Method for determining the degree of contamination of milk | |
DE1598138B2 (en) | Device for measuring the concentration of particles suspended in a flowing gas, in particular the soot content of the exhaust gases from internal combustion engines | |
DE847470C (en) | Device for the numerical recording of the amount of suspended particles in a solution | |
DE468428C (en) | Method and device for determining optical properties of liquids and gases | |
DE810440C (en) | Apparatus for determining the proportion of fluids, preferably for blood tests | |
DE2757039C3 (en) | Method and device for determining the sedimentation values, in particular the one-hour and two-hour values | |
AT144341B (en) | Method and device for making quantitative determinations by colorimetric means. | |
DE529309C (en) | Arrangement for measuring brightness, absorption coefficient, depth of color, etc. like | |
DE2830781C2 (en) | Gas measurement method for the measurement of halothane in air using test tubes | |
DE448003C (en) | Apparatus for determining the change in the vertical component of the attraction force in the vertical direction | |
DE829812C (en) | Photoelectric colorimeter | |
DE676898C (en) | Method and device for measuring the gradient of photographic layers | |
DE10049641B4 (en) | Colorimetric methods for determining the time of death, time and liquid content determination | |
DE550603C (en) | Device for measuring light for photographic recordings | |
DE530182C (en) | Device for automatic and continuous remote measurement of the density of liquids | |
DE2246458C3 (en) | Device for examining the contamination of a liquid in a vessel | |
DE927476C (en) | Method for the determination of germ counts, leukocyte counts and the like Like. In addition to the device for carrying out the method | |
DE379610C (en) | Arrangement for hardness and intensity measurement of X-ray or ultraviolet rays generated in tubes | |
DE867454C (en) | Humidity indicator | |
DE505587C (en) | Electric colorimeter and tyndall meter for the objective measurement of the coloration and turbidity of materials, especially liquids | |
DE955909C (en) | Method and device for bloodless oximetry | |
DE702025C (en) | Control wedge colorimeter |