00000nam 2200000za 4500 9.841364 CaOODSP 20221107152052 cr ||||||||||| 170810s1970 onc ob f000 0 eng d CaOODSP eng eng fre n-cn--- M34-20/117E-PDF M34-20/117 Syrett, B. C. The limitations of measuring pH by colour indicators [electronic resource] / B.C. Syrett and J.G. Garrison, Physical Metallurgy Division. Ottawa : Queen's Printer, 1970. v, 14 p. Technical bulletin ; TB 117 Cover title. "November 1969." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (p. 5). “Aqueous solutions containing various amounts of NaC1 and FeC12, were prepared and their pH's estimated using pH-indicators in three forms: indicator-impregnated filter paper, indicator-coated silica gel particles, and aqueous solutions of the indicators. It was found that silica gel was an unsuitable medium for carrying the indicator because of its own acidic nature, and that the proportion of indicator to test solution can influence the accuracy of the pH estimation. It was also found that the success of the indicator-paper method depends on the concentration of the indicating solution used in the preparation of the paper, and on the concentration of dissolved salts in the test solution"--Abstract, p. i. Includes abstract in French. gccst Steel Garrison, J. G. Canada. Natural Resources Canada. Canada. Mines Branch. Technical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch) TB 117 (CaOODSP)9.834857 PDF 1.59 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-117-eng.pdf 300003