NEED TO BOOK Practical activity 23 Graph paper Rulers Pencils Repro Practical sheet 23 PPQ x 2 LEARNING OBJECTIVE Know about colorimetry SUCCESS CRITERIA Explain quantitative methods to determine concentrations of a chemical in solution Including colorimetry and biosensors EXAMPLES OF BIOSENSORS? Explain quantitative methods to determine concentrations of a chemical in BIOSENSORS: solution PREGNANCY TEST Testing for hCG (human chorionic gonadotrophin hormone) Immobilised antibodies on a stick Antibodies are attached to a dye Hormone passes up the stick and binds to the complementary antibodies Making the dye become visible Second control line to show test is working 2 coloured ...
Useful Terminology Colorimetry is the use of the human eye to determine the concentration of colored species. Spectrophotometry is the use of instruments to make the same measurements. It extends the range of possible measurements beyond those that can be determined by the eye alone. Note: This experiment will demonstrate both techniques on the same set of dyes. Colorimetry Visual Observations – Because colorimetry is based on inspection of materials with the human eye, it is necessary to review aspects of visible light. Visible light is the narrow range of electromagnetic waves with the wavelength of 400-700 nm. ...
A. Colorymetry Colorimetry merupakan ilmu pengetahuan dan teknologi yang digunakan untuk mengukur dan menyatakan secara fisik penerimaan atau persepsi manusia tentang warna. Dengan kata lain adalah ilmu tentang pengukuran warna. Colorymetry Colorymetry, terkait dengan tata cahaya, terutama berkaitan dengan : (1) spektrum warna, (2) besaran warna,dan (3) pencampuran warna Colorymetry 1. Spektrum Warna Apabila seberkas sinar matahari dilewatkan kepada suatu prisma, maka sinar matahari yang terlihat tidak berwarna tersebut akan terurai menjadi cahaya- cahaya berwarna mulai dari merah sampai dengan ungu (violet) Colorymetry 2. Besaran (Properti) Warna Dalam menerima atau mempersepsi warna, kita mengenal tiga besaran (properti) warna yang ...
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