Water testing

An indication whether a water-insoluble compound is an acid or a phenol (or enol) will be obtained from the Solubihty Tests water-soluble acids will bberate carbon dioxide from 5 per cent, sodium bicarbonate solution see Section III,85,(i). ... 

StandardProcedureforField Testing Water-BasedDrillingFluids, API RP 13B-1,1st ed., American Petroleum Institute, Washiagton, D.C., June 1990. 

AATCC methods for determining water repeUency are AATCC 22 (spray test) and AATCC 70 (tumble jar dynamic absorption test). In the spray test, water is sprayed against the taut surface of the test specimen to produce a wetted pattern the size of which depends on the repeUency of the fabric. Evaluation is by comparing the pattern with a series of patterns on a standard chart. The latter method evaluates the percentage by weight of water absorbed by a sample after dynamic exposure to water for a specified period of time. 

Specimen Location Steel baffle plate from a test water box containing flowing cooling water... 

A test water box was installed during a 2-week trial to monitor corrosion and fouling in a utility cooling water system. A baffle plate from the test box was removed after the test. Small, hollow incipient tubercles dotted surfaces (Fig. 3.28). Small amounts of carbonate were present atop and around each tubercle. Each tubercle capped a small depression no deeper than 0.005 in. (0.013 cm) (Fig. 3.29). This indicated local average corrosion rates were as high as 130 mihy (3.3 mm/y). 

D 2247 1987 Practice for testing water resistance of coatings in 100% relative humidity... 

Toxicity Test (Bioassay). Organisms representative of those to be protected are exposed to the test water under rigorously controlled conditions, usually in a laboratory environment. In this test the organisms, normally fish, are exposed for a standard time period in aquaria to various dilutions of waste or river water while some physiological parameter is carefully monitored to determine fish response. Behavior is also observed. 

Anonymous. Standard procedure for field testing water-hased drilling fluids Second edition. APIRp, pages 13b-l, September 1997. 

Watkins, J.W., Analytical Methods of Testing Waters to be Injected into Subsurface Oil-Productive Strata, Report No. 5031, U.S. Bureau of Mines, Washington, 1954. 

We now have five remaining unknowns—Qm, pm, p, Lm and (AP)f— and only two remaining equations, so we still have three arbitrary choices. Of course, we will choose a pipe length for the model that is much less than the 700 miles in the field, but it only has to be much longer than its diameter to avoid end effects. Thus we can choose any convenient length that will fit into the lab (say 50 ft), which still leaves two arbitrary unknowns to specify. Since there are two fluid properties to specify (p and p), this means that we can choose (arbitrarily) any (Newtonian) fluid for the lab test. Water is the most convenient, available, and inexpensive fluid, and if we use it (p = 1 cP, p = 1 g/cm3) we will have used up all our arbitrary choices. The remaining two unknowns, Qm and (AP)f, are determined by the two remaining equations. From Eq. (2-12),... 

Six juvenile garter snakes (Thamnophis sirtalis and Thamnophis radix), three of each sex, were used in this study. The snakes were housed individually in ventilated plastic containers. During earthworm extract trailing and the foraging task snakes were fed earthworms only in the maze. During airborne delivery of odors and open field exploration snakes were fed earthworms once a week, just before a two day weekend during which they were not tested. Water was available ad libitum. 

M272 Water Testing Kit A lightweight portable kit used to detect and identify dangerous levels of common chemical warfare agents in raw and treated water in about seven minutes. It is a test water sampler and is not a continuous monitor. Each kit includes twenty-five tests for each agent. 

What is the smallest concentration of Cl (aq) in the test water that will cause the formation of a precipitate ... 

In the small-scale tests, water was jetted into the salt both from above and below the interface. Explosions were erratic with many tests simply producing water vapor which ejected the salt. In some tests, high-speed photography was employed and, at the highest framing speeds (13,000 fps), the explosion, if it occurred, took place within the time of a single frame, i.e., <77 ju,sec. No definitive conclusions were drawn except that, if an explosion did occur, it was very short in duration and rather destructive. 

Bringmann. G. and Ktihn. G. Comparison of the toxicity thresholds of water pollntants to bacteria, algae and protozoa in the cell multiplication inhibition test. Water Res., 14(3) 231-241. 1980. 

The test organisms are exposed for 24, 48, and 96 hours to different concentrations of testing water. After the exposure period the number of dead organisms is counted. Each test sample container is examined and the number of dead organisms counted (looking for the absence of swimming movements). A test is regarded as valid if the mortality in the control is <10%. Toxicity is calculated as ... 

Dutka, B.J. Nyholm, N. Petersen, J. Comparison of several microbiological toxicity screening tests. Water. Res. 1983, 17, 1363-1368. 

I tested the plasma ignition system in my 6.5hp 4-stroke engine with gasoline and propane (didn t test water yet). I used HV pulses from the original ignition coil as trigger or pilot sparks. I had to reverse the polarities of the bridge rectifier, two diodes and the capacitor to get a better pilot spark. The schematic and details are ... 

Water pressure test Water 10-= 70 Positive pressure No... 

Tests. Water, in accordance with ASTM D1193-66, and reagent grade chemicals shall be used for testing. Blanks shall be run and corrections applied when significant... 

L Haridon, J., Fernandez, M., Ferrier, V. Bellan, J. (1993) Evaluation of the genotxicity of N-nitrosoatrazine, 7V-nitrosodiethanolamine and their precursors in vivo using the newt micronucleus test. Water Res., 27, 855-862... 

Sampling and testing water for cleaning or initial rinsing at least once a week. All sampling points or points of use in the distribution system shall be sampled at least monthly. 

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