PREAMBLECurrently the food industry in our country is developing at a rapid pace. As society develops, the demand of people demanding increasingly high food quality. To meet this requirement, the food industry needs to focus on the work of analytical quality criteria of the food.Checking accuracy of product qualities will help test in production facility reviews correctness of his work results, production control according to the specified direction, discovered the shortcomings of using raw materials, process, manipulate, search out the cause does not guarantee the quality to adjust in time.Through the quality control of raw materials, product sales and product quality divisions, based on that, find the measure of improving the quality of products and product recall effective means improving economic efficiency.Analytical techniques essay food consists of four chapters: base analysis, sensory analysis, chemical analysis, physical analysis of microorganisms. On the basis of the theoretical knowledge and practice will help the tested acquire the basic knowledge to manipulate reviews of the quality of the food items. PART I BASE ANALYSIS1.1 significance of the sampling.-Sampling is an important stage in evaluating the quality of batches of the product, the work requires extreme caution, because templates must accurately reflect all the characteristics and quality are characteristic for the average composition of batches of the product.-In fact much debate about the quality of goods, performance of work equipment, performance, the productivity of an enterprise always be solved by the method of sampling and sample analysis results. So if not careful sampling and incorrect methods, though the exact methods of analysis also leads to the assessment of the product essentially confused.-Though check the indicator and by what method for this type of product would be through the sampling and to know how to obtain the sample. For each type of product depending on the separate property that contains the rules for the different samples. Because that's hard to map out the fixed rule is accepted for every situation and for every product. -Regular sampling to the following purposes: + Check out the production process. + Inspection. + Identify characteristics of the plot. + To conduct the test. + Reviews the market.1.2 some general concepts.1.2.1 sample.A unit or group of units of the product retrieved from a collection (to provide overall information and can make decision base for the collection. 1.2.2 enable the sample. Is the sampling procedure or create patterns. 1.2.3 collection. Collection (overall) is the entire unit of product review. Depending on the overall case can be a lot, a lot number or a production process. 1.2.4 product unit. Product unit is a specific object or a certain material to conduct the test. 1.2.5 sampling units. Is the unit of the product from which the sample for analysis. Sample units can be a unit or group of products. 1.2.6 the shipment. The shipment or production of certain goods is to have the same name, the same quality class, the same type of packaging, same brand, manufactured in the same factory and at the same time near each other, the same certificate of quality, the same transportation means and be delivered at once. 1.2.7 the original sample. Is a weight taken at once from a master unit (with packaging or no packaging). 1.2.8 Sampling. A separate form (also known as the base template) was obtained by coordinating many of the original sample retrieved from a collection to make representation to the set. 1.2.9 Sampling. Is the set of all samples of a private collection. 1.2.10 the average Sample. The sample is prepared from a common template in order to conduct the analysis. 1.2.11 Sample analysis. Is the average sample mix well and divide into as many sections as each other, taking a little modeling analysis. 1.3 the requirements of sampling. -The samples taken must represent the qualities for a commodity. -The model must have qualities of stability during the time saved and preserved samples. -The model is right, the tool, taking and the amount retrieved each specific product type as specified. 1.4 sampling method. 1.4.1 initial instruction. 1.4.1.1 sampling locations. Sampling at the preserve, unloaded or transported, at each point (or after each device) in the production process, at the point of import of raw materials and export of finished products. 1.4.1.2 preliminary test batches of the product. Before sampling to check the uniformity of the shipment based on the General rules and against the shipment profile attached and fully tested in packaging your shipment status. If the shipment is stored in the repository, the need to check the status of the repository. In the case of heterogeneous products (such as partially damaged or wet, many different production processes, ...) then you have to divide the shipment of small parts, each part having nearly the same properties make a separate shipment. Before sampling to consider the product's packaging and the extent possible should consider packaging of each product unit. Product in damaged packaging must be removed 6 and noted in the minutes of sampling. 1.4.1.3 sampling location. Sampling locations are determined by random location but need to clean the product taken off the rope without being dirty. 1.4.2 sampling tools. 1.4.2.1 the shape. For the different product types, the shape of the type of sample packaging tools are also different. Need to use these tools can give us the ability to derive the original sample from the thickness of any of the different layers of the shipment. The shape, material, length and magnitude of sampling tools and containers all samples must be based on consistent standards for each type of product. In addition to the extra details such as rods, wires, pipes, buttons ... must also ensure quality under the effect of chemical products. For liquid or gaseous products often use instruments such as pipe ... from glass or plastic materials. Tools for sampling from the bag: skewer sacks, cylindrical, conical, oblique spoon handheld gizmos. Sample tools from goods include shovels, scoop hand held exposure, sampling tools, cylinder, cone, air sampling and other instruments. There are also other General instruments such as:-Open tool chest.-Mixed Tray of samples (must dry clean, no strange smells).-Sample bags with PE or glass grinding, dry clean button no strange smells, -Weight technique.-Alcohol Lamps, cutlery.1.4.2.2 prepare for sampling. Sampling tools must be washed, drying or dry, at least have to be alcoholic or coated several times with product sampling. The product was used to rinse the necessary tools not be used again to do the analysis model (not to be mixed with the sample). Special care is needed to ensure all the instruments for sampling and the sample container are clean, dry, non-random contamination such as water, dust.1.4.3 The specimen forms are often taken to test. Samples taken from the production line consists of samples of raw materials, semi-finished products or finished products. This is a system for continuous sampling, the sampling allows for checking production processes have stable or not. Samples taken in a lot, usually the samples taken in raw material warehouse or warehouse to sell 7. It is a collection specified. Model which allows to determine and evaluate the quality of the product, usual reviews by disabled rate. Usually, depending on the type of item for which the model regulations accordingly, easy to represent, the ease of analysis:For liquid products such as canned, bottled mineral water, soft drinks, milk ... the unit model is the bottle or box. For loose products such as egg, Orange, candy cake ... then the unit model is the result, or a unit of mass, but for small products such as grape, the sample unit is the beam or kilogam. To conduct sample quickly and with no conditions to the properties of the affected products (such as rain, sunshine, dust, heat, cold, etc.). In the initial sampling process and in all the subsequent operation is to be careful to avoid causing contamination of samples or any other variation that can cause adverse effects to the residue or analysis work or make Labs represent general patterns. PART IISENSORY ANALYSIS2.1. The concept.2.1.1. Definition.-Sensory analysis is the technique of using the human sense organs to explore, describe and quantify sensory properties of a food product such as colors, shapes, flavors and structure ".The senses of people try to be used as a measuring tool to learn and description to point out the different sensory properties of food. This was recognized by the sense organs and the objective nature of capital
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