Antibodies to thyroid peroxidase can result in symptoms of low thyroid such as fatigue, weight gain, dry skin and constipation. Conditions such as Hashimotoâs thyroiditis, lupus, rheumatoid arthritis, and pernicious anemia often have these antibodies present.Fasting is not required for this test.ntibodies to thyroid peroxidase can result in symptoms of low thyroid such as fatigue, weight gain, dry skin and constipation. Conditions such as Hashimotoâs thyroiditis, lupus, rheumatoid arthritis, and pernicious anemia often have these antibodies present.
CDCl3 is a common solvent used for NMR analysis. It is used because most compounds will dissolve in it, it is volatile and therefore easy to get rid of, and it is non-reactive and will not exchange its deuterium with protons in the molecule being studied.
In other words you must have a significant quantity of a deuterated solvent present. In the old days chemists made CDCl3 for their NMR exps because it was easy to make. Even today it is the cheapest deuterated organic solvent available (as it is benzene-d6, acetone-d6 and DCM-d2 have more deuterium atoms).