(a) Interpretation: The two monosaccharide units in the disaccharide needs to be identified. Concept Introduction: Disaccharides are carbohydrates which contain two monosaccharide units joined by a glycosidic bond. The bond amid the anomeric carbon of glycoside and a -OR group is called a glycosidic bond. The bond amid the anomeric carbon of one monosaccharide unit, plus the -OH group of another monosaccharide unit.

Question

There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS). Ca, ppm V, ppm SCa, arb. units SV, arb. units 20.0 10.0 14375.11 14261.02 40.0 10.0 36182.15 17997.10 60.0 10.0 39275.74 12988.01 80.0 10.0 57530.75 14268.54 100.0…

Answer 1

Question

Chapter 20, Problem 20.41P

Interpretation Introduction

(a)

Interpretation:

The two monosaccharide units in the disaccharide needs to be identified.

Concept Introduction:

Disaccharides are carbohydrates which contain two monosaccharide units joined by a glycosidic bond. The bond amid the anomeric carbon of glycoside and a -OR group is called a glycosidic bond. The bond amid the anomeric carbon of one monosaccharide unit, plus the -OH group of another monosaccharide unit.

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There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS). Ca, ppm V, ppm SCa, arb. units SV, arb. units 20.0 10.0 14375.11 14261.02 40.0 10.0 36182.15 17997.10 60.0 10.0 39275.74 12988.01 80.0 10.0 57530.75 14268.54 100.0…

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