Qualitative Food Tests - 1585 Words

Name: Marcus Gonzales Date: Wednesday 12th September 2012 Form: L62 Subject: Biology Teacher: Ms. Hutton Lab #: 1 Title: Food Tests Aim: To test an unknown substance for various food substances. Apparatus/Materials: * Unknown Solution X * NaOH * Iodine * Ethanol * Copper Sulphate * Benedict’s Solution * HCl * Cold Water * Syringe * Beakers * Bunsen burner * Tripod stand * Test tubes * Dropper Introduction: This Lab shows the detection of different food sources using different tests. Some of the food tests carried out was Benedict’s test, the test for non-reducing sugars, iodine test (test for starches), emulsion test and the biuret test. Carbohydrates include†¦show more content†¦| Emulsion Test (Test for Fats/Lipids) †¢ 2cm3 of Unknown Solution X was added into a test tube.†¢ 2cm3 of concentrated ethanol was added to the solution.†¢ The mixture was shaken vigorously.†¢ 4cm3 of cold water was added then it was shaken vigorously. | Cloudy White emulsion was suspended in the solution. | This showed that there was a moderate amount lipid in the solution. | Iodine Test (Test for Starch) †¢ 2cm3 of Unknown Solution X was added into a test tube.†¢ The same amount of NaOH was added into the solution.†¢ Approximately 2cm3 of copper sulphate were added to the solution. | A small amount of blue-black precipitate suspended in yellow-cream solution. | Due to the small reaction, this experiment showed that there was a small amount of starch in the solution | Protein Test †¢ 2cm3 of Unknown Solution X was added into a test tube.†¢ The same amount of NaOH was added into the solution.†¢ Approximately 2cm3 of copper sulphate were added to the solution. | Blue precipitate suspended in purple solution. | Protein was present in the solution. Due to the dark colour of the solution there was a large amount of protein present | Discussion: The first test Benedict’s test is the test for reducing sugars. Reducing sugars have a hydroxyl tail that reduces the copper (II) ions to copper (I). The copper (II) I blue inShow MoreRelatedDetermination Of Blood Glucose Levels And Qualitative Carbohydrate Tests1507 Words   |  7 PagesPractical Report (Determination of blood glucose levels and qualitative carbohydrate tests) Introduction: The term ‘’Carbohydrates’’ is defined as the carbon compounds which contains hydroxyl groups in large quantities (King, 2013). Carbohydrates are those organic compounds which have the empirical formula CnH2nOn, or (CH2O)n (Fromm 1997). Carbohydrates are one of the four types of organic compounds in living cells that are produces during photosynthesis and are the important source of energy inRead MoreMarketing Research Tools Essay1215 Words   |  5 Pagesresearch, qualitative research, quantitative research, and focus group as their research tools. Each of these tools has its own strengths and limitations. Primary research, such as surveys, will give Team C greater control while answering specific research questions. Additionally, it is also proprietary information. This means that Team C has ownership of the information it acquires with this tool. However, primary research is often time- consuming and costly. By contrast, qualitative research,Read MoreFast Food Industry Research Proposal1593 Words   |  7 PagesResearch Proposal (Fast Food Industry) To study the attitude towards consumption of healthy food within the fast food industry Background We are a marketing research team of a fast food chain store. With increasing awareness about healthy food among the masses and with consumer preferences changing towards healthy food, we intend to launch a health food segment to cater to this need of the customers. We are also concerned about the pricing of the product that whether it should be priced same asRead MoreA Exploratory And Formal Studies Essay884 Words   |  4 Pagesvariables then the study is casual. Qualitative and Quantitative Research Qualitative Research is primarily exploratory research. It is used to gain an understanding of underlying reasons, opinions, and motivations. It provides insights into the problem or helps to develop ideas or hypotheses for potential quantitative research. Qualitative Research is also used to uncover trends in thought and opinions, and dive deeper into the problem. Qualitative data collection methods vary using unstructuredRead MoreOrganic Compounds Lab Report Essay703 Words   |  3 Pagesthe main chemical content of a given substance. In previous labs, there were tests with three chemicals, Lugols solution, Benedicts solution, and Biuret solution. The tests were qualitative and tested for the presence of sugars, starches, or proteins within a given substance. The substances were already known, so the tests were used to figure out what each solution showed presence of. After going through all of the tests, Lugols solution showed the presence of starch, Benedicts solution showedRea d MoreAnalysis Of The Chemical Components Of Milk1641 Words   |  7 PagesBetter Milk? Analysis of the Chemical Components of Milk. Objective: The main goals of this lab experiment were to perform a natural product separation in order to identify the major components of milk. Also, students were asked to use qualitative analytical tests in order to assign polar or non-polar properties to a component based on the separation scheme that was created from the separation. Introduction: Milk is a complex liquid that is composed of numerous different substances. Those substancesRead MoreUnit 3 Introduction To Marketing P3 M2 D21716 Words   |  7 Pagesgathering, recording and analysing data and also about the issues relating to marketing products and services. There are two types of research’s that can be conducted: Primary Secondary These research can then be formed into either quantitative or qualitative Primary Research Primary research is data and information that the business has gathered first-hand and has not been gathered before. Internal primary research data sources include: Sales figures for the business’s own products Customer dataRead MoreDonatos Pizza Case Study1272 Words   |  6 Pagesinformation about diet and feeling that exist within a culture within the employee s information can be used by Donato s, to become an opportunity to develop a new product. For example, according to 2003 health-focus trend reports, 26% of consumers of food are carb conscious. This suggests that most people eat low-carb diet into their diet habits.So Donato s commercial focus on taste of new product, it emphasis that it is still same delicious taste but it is no carb at the same time.Name of newRead MoreHv Essay763 Words   |  4 Pagesassays (indirect assays) Tests which detect anti-HCV are used to screen, and to diagnose hepatitis C infection. Enzyme Immunoassays (EIAs), Chemiluminescence Immunoassay (CIA) and Recombinant Immunoblot Assay (RIBA) are approved by the Food and Drug Administration (FDA) for clinical use (Colin et al., 2001). The specificity of current EIAs for anti-HCV is greater than 99%. False positive results are more likely to occur in low-risk populations, however false negative tests can occur in the settingRead MoreKellogg s Case Study : Describe The Purpose Of Market Research?893 Words   |  4 Pagesmany more. External Sources Consist of data found outside the company. External sources are vital if the firm is to expand in another country. Normally the firm takes into consideration: Analyse why an organisation like Kellogg’s would use both qualitative and quantitative data? Quantitative research is a more logical and data-led approach which provides a measure of what people think from a statistical and numerical point of view. For example, a company would use quantitative research if it wanted