quality of any herbal compounds determined by not only above things but also chemical composition, presence of active ingredients. pectin generally obtained from middle lamella of plant cells. it is generally composed of methoxy ester of pectic acid, polyuronoids and other substances along with complex polysaccharide consisting mainly of esterified D-galacturonic acid resides in an alpha-(1-4) chain.
therefore chemical evaluation like chemical tests is more important parameters along with others.