Urine analyzer is an automated instrument for determining certain chemical components in urine. It is an important tool for automated urine inspection in medical laboratories. This instrument has the advantages of simple and fast operation. However, improper use of urine analyzers and many intermediate links and influencing factors directly affect the accuracy of automated analysis results, which will not only cause errors in experimental results, but even delay diagnosis. Therefore, operators are required to understand the principles, performance and precautions of automated instruments. And the knowledge of influencing factors and other aspects are fully understood, and the correct use of automated instruments can make the results obtained by the urine analyzer more reliable and accurate. Medical Urine Analyzer,Semi Automatic Urine Analyzer,Urine Analyzer and Strips,Accurate Urine Analyzer Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com
application
In the 1950s, a single dry chemical test strip method was used to measure protein and glucose in urine, and the changes in the color of the test strip were observed with the naked eye and compared with the standard plate to obtain the corresponding values. In the 1980s, due to the high development and widespread use of computer technology, automated urine analyzers also developed rapidly, gradually developing from semi-automatic to fully-automated. Urine analyzers are often divided into two categories according to the test items: â‘ 8-11 screening combined urine test strips mainly used for newly diagnosed patients and health examinations. The eight test items included protein, glucose, PH, ketone bodies, bilirubin, urobilinogen, red blood cells (occult blood) and nitrite; in addition to the above eight tests, urine leukocyte test was added to the nine test items. On the basis of 9 of the 10 urine analyzer testing items, the urine specific density test was added. 11 testing items have added vitamin C testing. â‘¡It is mainly used for the observation of the curative effect of the diagnosed diseases, such as the combination test strip of PH, protein and occult blood (red blood cells) for kidney disease; the combination test strip of PH, sugar and ketone body for diabetes; the combination of bilirubin and urobilinogen for liver disease test tape.
principle
This type of instrument is generally controlled by a microcomputer, and the color change on the test strip is measured semi-quantitatively by using a spherical integrator to receive dual-wavelength reflected light. There are several reagent pads containing various reagents on the reagent strip, each of which reacts independently with the corresponding components in the urine, and displays different colors. The depth of the color is proportional to a certain component in the urine, and there is another in the reagent strip" Compensation pad", as the urine background color, compensates for the errors caused by colored urine and instrument changes.
Put the reagent strip with urine adsorbed in the colorimetric tank of the instrument, and the various reagent pads that have produced chemical reactions on the reagent strip are illuminated by the light source, and the reflected light is received by the spherical analyzer, and the photocell of the spherical analyzer is reflected. Irradiate with dual-wavelength light (measurement light passing through the filter and a reference light), and the selection of each wavelength is determined by the detection item.
The instrument automatically calculates the reflectance according to the following formula, and then compares it with the standard curve, and automatically finds and prints the corresponding results of various components. If the content of a certain component in the urine is high, the reflected light of the corresponding reagent pad is dark, otherwise it is strong.
Reflectance fraction: R(%)=Tm.Cs/TsCm×100%
In the formula, R(%) is the reflectivity; Tm is the reflection intensity of the reagent pad to the measurement wavelength; Ts is the reflection intensity of the reagent pad to the reference wavelength; Cm is the reflection intensity of the calibration pad to the measurement defect length; Cs is the calibration pair. Reflection intensity at the reference wavelength.
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1. Raw materials and their requirements Fresh plum squid and frozen plum squid (frozen goods require normal color and odor, and my rancid and other deteriorating odors, and the organization is tight and flexible). 2, the main production equipment cold storage, fish washers, far infrared ovens, vacuum sealing machine, vertical retort, cooling pool. 3, production process and operation points Frozen fish → thaw → cleaning → to impurities → Drain → seasoning pickled → drying → baking → coating egg white liquid → samed sesame seeds → baking → secondary seasoning (sprinkle amount of salt and pepper powder, Pepper) → cooling → weighing → vacuum packaging → high-temperature sterilization → cooling → inspection → finished product storage. 4. Raw material treatment uses fresh or frozen plum bass as raw material. Clean fresh fish with surface water, dirt, mucus and other dirt. Freeze the fish in water or air below 25°C to thaw, remove impurities and wash it with running water. dry. 5. According to the weight of the net fish, the salting ingredients are 1.6% salt, 0.8% MSG, 2.5% cooking wine, 5% sugar, 1% ginger slice, 0.5% cinnamon bark, and pickled for 3 hours. 6, drying and drying to 40% of the original fish weight, water can be about 40% dry. If the water is overheated, turning the fish off will break the water, and the water content is too low to taste. 7. Before baking, bake the fish body with appropriate amount of seasoning liquid and put it into a far-infrared oven. When it is baked at 240°C until it is yellow, take out the coated egg and sprinkle with sesame seeds. Then bake it until the fish body is golden brown. When the scent is removed, the second seasoning grilled squid can be made into five flavors, fresh squid, salt and pepper, etc. as needed. Cooling, the yield is about 42% of the original fish weight. 8, packaging weighing bagging vacuum packaging. 9, sterilization and cooling sterilization formula 15-20-10/118 °C, cooling inspection, packing storage. 10. Insulation test A random sample was placed in a 37-degree incubator, and seven days later, it was checked for deterioration. 11, the quality of plum canned soft canned fish flavor, delicious palatability. Shelf life is six months. Hygiene quality test results should meet the canned food hygiene standards.