(1924). (5) Kolthoff, I. M., and Furman, N. H., âVolumetric Analysis,â. Vol. 11, p. 363, New York, John Wiley & Sons, 1929. (6) Kolthoff, I. M., a...
or 5-day concentration ratios, from estimates of uptake and elimination rates. If all the laboratory-derived biocon- centration factors had been 96-h values, ...
Apr 28, 2017 - R.P. BAHUGUNA~ and J.S. JANGWAN. Department of Chemistry, Garbwal University, Srinagar, V.P., 2461 74 P . Box-38, India n-triacontane ...
or 5-day concentration ratios, from estimates of uptake and elimination rates. If all the laboratory-derived biocon- centration factors had been 96-h values, ...
Literature Cited. (I) NBUMANN. Z. awge~. Cl~m., 38, Xli ... travel along the surface of the earth and others pass through it. By measuring the acceleration and ...
(6) Most of the data of Table 11, as well as of the succeeding tables, are taken ... Two thousand miles of peridotite rock (consisting of iron magnesium silicate).
zenbach et al. in their budgeting of 1,4-dichlorobenzene in. Lake Zurich (8). In the case of Lake Zurich the investigators chose to resolve the discrepancy by ...
that the transfer of DBCP in a shower was most likely overpredicted by more than a factor of 4 because McKone assumes that the transfer efficiency is directly ...
1991, 25, 2097-2097. SIR: The correspondence by Zatka and Warner refer- ring to our paper (I) shows the complexity in the study of occupational exposures to ...
Sep 23, 1987 - 1992, 26, 1258-1259 ditional studies conducted by our group have shown that the concentrations and distributions of dioxin in Newark.
However, the effects of oxidation products or other compounds resulting from atmospheric exposure of derris have not been investigated. Summary. Derris administered orally to rabbits in amounts up to 30 mg. per kg. of body weight daily for a period o
March 15, 1935
ANALYTICAL EDITION
81
with standard thiosulfate. Table I11 shows the effect of varying conditions, 1.0 gram of potassium bromide having been used throughout. Teorell (11) has introduced a sensitive micromethod for ammonia, back-titrating the excess hypobromite with naphthyl red. It seems probable that calcium hypochlorite could profitably be substituted in this method as well, being more stable than the sodium hypobromite originally specified.
titration of the excess arsenite with standard hypochlorite solution) yielded excellent results and is especially advantageous in the presence of colored compounds or in the determination of extremely small amounts of ammonia with reagents 0.01 I\i or even more dilute. The data in Table V show that quantities of ammonia as small as 0.5 mg. in a volume of 25 cc. can be determined with a maximum error of about 2 per cent, using the general procedure described above. The iodometric procedure yields TABLE IV. DETERMINATION OF AMMONIA IN ALKALINE MEDIUM errors of the same magnitude hpt is preferable in the absence NITROQEN TIMEOF NITROGEN SALTS of other oxidizing substances, since the color change of the TAkEX BUFFER STANDING FOUNDERROR PRESENT iodine starch is sharper than that of Bordeaux in these very Grams M i n . 1MQ. Me. MQ. % dilute solutions. Blanks should be run along with the de10.51 5 NaHCOt 3 10.61 11.0 ... 10.51 10.55 3 NaHCOa 3 +0.4 ... terminations, as traces of reducing substances are likely to be 10.51 10.61 1 NaHCOs 3 0.0 ... 10.51 10.52 1 NaHCOs 12 +o. 1 present in the water used as a solyent and some bromine or ... 14.06 15 14.01 0.5 NaHCOs 4-0.4 oxygen may be lost by decomposition of the hypobromite on 5 +0.2 14.04 14.01. 0.5 NaHCOs 14.05 14.01 0.5 NaHCOa 5 f0.3 30
