Cane sugar Analysis

Irudayaraj, J., Xu, F., and Tewari, J. (2003). Rapid determination of invert cane sugar adulteration in honey using FTIR spectroscopy and multivariate analysis. /. Food Sci. 68, 2040-2045. 

Analysis of raw and refined cane sugar is carried out like that of raw and refined beet sugar. 

Now let s suppose you analyzed 500.0 g of sucrose isolated from a sample of sugar cane. The analysis is shown in Table 3-5. Note in Column 2 that the percent by mass values equal those in Column 2 in Table 3-4. According to the law of definite proportions, samples of a compound from any source must have the same mass proportions. Conversely, compounds with different mass proportions must be different compounds. Thus, you can conclude that samples of sucrose always will be composed of 42.2% carbon, 6.50% hydrogen, and 51.30% oxygen. 

Cardoso, D.R., Andrade Sobrinho, L.G., Lima Neto, B.S. and Franco, D.W. (2004) A rapid and sensitive method for dimethylsulphide analysis in Brazilian sugar cane sugar spirits and other distilled beverages,/. Braz. Chem. Soc., 15(2), 277-281. 

Baunsgaard D, Nprgaard L, Godshall MA, Specific screening for color precursors and colorants in beet and cane sugar liquors in relation to model colorants using spectrofluorometry evaluated by HPLC and multiway data analysis, Journal of Agriculture and Food Chemistry, 2001, 49, 1687-1694. 

Carbon stable isotope ratio (CSIR) analysis of sugar utilizing an isotope ratio mass spectrometer (IRMS) is routinely used to detect the addition of cane sugar and corn syrup to most juices with the exception of pineapple. The inability of CSIR analysis to detect beet sugar in orange and apple juices because of metabolic similarities between adulterant and authentic products has required alternative methods, e.g., combination of IRMS and nuclear magnetic resonance (NMR) spectroscopy. The method requires the determination of five isotope ratios after fermentation of the juice the H/ H and iSq/ISo ratios of the fermentation water plus the total C/ C and H/ H ratios on the methyl and methylenic groups of the alcoholic distillate. 

Citrates, oxalates, salicylates, glycerol, and cane sugar also stabilize alkaline solution of cupric salts. Some of these, citrates in particular, have been used in the preparation of copper solutions for sugar analysis. 

Sia, J., Yee, H.-B., Santos, J. and Abdurrahman, M. (2010) Cyclic voltammetric analysis of antioxidant activity in cane sugars and palm sugars from Southeast Asia. Food Chem., 118, 840-846. 

Kinetics—the measurement and analysis of rates of reaction—also finds its origin in the early nineteenth century. We already mentioned Thenard s measurements of the rate of hydrogen peroxide decomposition, around 1818. The first systematic analysis of reaction rates is attributed to Ludwig Wilhelmy. Around 1850 he measured the rate of inversion of cane sugar in the presence of different acids, by means of a polarimeter. He noted that the rate of change in sugar concentration was proportional to the concentrations of both the sugar and the acid. To analyze the data, he set up differential equations for the reaction rate. He even proposed an empirical relation to express the influence of temperature on the rate of reaction. 

Composition. Molasses composition depends on several factors, eg, locality, variety, sod, climate, and processing. Cane molasses is generally at pH 5.5—6.5 and contains 30—40 wt % sucrose and 15—20 wt % reducing sugars. Beet molasses is ca 7.5—8.6 pH, and contains ca 50—60 wt % sucrose, a trace of reducing sugars, and 0.5—2.0 wt % raffinose. Cane molasses contains less ash, less nitrogenous material, but considerably more vitamins than beet molasses. Composition of selected molasses products is Hsted in Table 7. Procedures for molasses analysis are avadable (59). 

J. M. Rohwer and F. C. Botha, Analysis of sucrose accumulation in the sugar cane culm on the basis of in vitro kinetic data. Biochem. J. 358, 437 445 (2001). 

Inorganic quantitative analysis of sugar cane juice, vinasse, and molasses. 1. Calcium, magnesium, potassium, sulfur and phosphorus determination in single ex- SO099 tract. An Esc Super Agr Luiz Dr Queiroz Univ Sao Paulo 1972 29 5. 

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