insoluble residue

insoluble residue

[in′säl·yə·bəl ′rez·ə‚dü]
(geology)
Material remaining after a geological specimen is dissolved in hydrochloric or acetic acid.

insoluble residue

That portion of an aggregate or cement which is not soluble in diluted hydrochloric acid.
References in periodicals archive ?
With 3 M sodium hydroxide pretreatment, the insoluble residue fraction contained 72.9% cellulose, 9.1% hemicellulose, and 9.0% lignin per 100 g dry biomass.
The influence of modification time on the concentration of insoluble residue is presented in Tables 1 and 2.
The average mineral composition of drill core sections, each 0.5-2 m long, as well as the insoluble residue of selected samples from different layers were studied by XRD and selectively by scanning electron microscopy integrated with energy-dispersive X-ray spectroscopy (SEM-EDS) methods.
Portland cement's insoluble residue is due to the addition of pozzolans, also identified in the chemical composition (Table 1).
In the Margala Hill Limestone this type of fabric found within middle shelf facies seems to be the result of continuous dissolution of texturally homogenous limestone with appreciable quantity of uniformly distributed clay minerals or iron oxide insoluble residue (Plate 1H).
Calcium concentrations calculated based on starting shell weights averaged 56 [+ or -] 18% of concentrations expected in stoichiometric CaC[O.sub.3]; these systematically low values are consistent with samples having appreciable insoluble residue contents (in agreement with the range of our insoluble residue determinations described earlier).
Klason lignin was determined as the 12 M [H.sub.2]S[O.sub.4] insoluble residue. Total DF is the sum of Klason lignin and total NSP.
It is also interesting to observe that most trace elements display positive interrelationships with the major insoluble residue components of the rock (Table 6) and prominent among these are the Si[O.sub.2]--[Al.sub.2][O.sub.3]--[K.sub.2]O--Ti[O.sub.2] --[Fe.sub.2][O.sub.3]--Ba--Nb--Rb--Zr links (Table 6, Figure 10).