Sampling in test

Ignition Temperature (French Test) — igoites in 6 secs, when a small sample in test tube was plunged into a bath preheated to 370° the time was 1 sec, when the temp in die bath was 430°... 

Figure 8. The cryogenic biological radiation box used for irradiating samples in test tubes at controlled temperature between 80° and — 196°C.

The total time for analysis—including sample preparation, separation, and detection—was 12.5 minutes for one sample, or 22 minutes for the sample and spiked sample. In tests on actual Hanford nuclear-waste samples, comparing results from the automated analyzer method to laboratory ICP-MS determinations, the analyzer method proved to be accurate in the determination of total "Tc. 

Selected data on the activity and selectivity of the samples in test reactions ... 

In 1904, Dr. Karl Landsteiner performed a series of experiments on the blood of workers in his laboratory. His results explained the mysterious transfusion fatalities, and blood transfusions were reinstated as a lifesaving clinical tool. Landsteiner took blood samples from his coworkers. He separated the blood cells from the serum, the liquid component of the blood, and mixed these samples in test tubes. When he mixed serum from one individual with blood cells of another, Landsteiner observed that, in some instances, the serum samples caused clumping, or agglutination, of red blood cells (RBC). The agglutination reaction always indicated that the two bloods were incompatible and transfusion could lead to life-threatening reactions. As a result of many such experiments, Landsteiner showed that there are four human blood groups, designated A, B, AB, and O. 

Place sample in test chamber (The test chamber consisted of a 4 inch viewport with... 

For heating, use a hot plate or a heating mantle whenever possible. Open flames, a Bunsen burner, or, if there is no gas connection, an alcohol or Sterno burner should be used only when it is necessary to heat the samples in test tubes or pyrolysis tubes. For flame tests, a candle is sufficient. 

Subsurface soil-gas sampling in test wells was made using an IMS encased in a 51-mm diameter stainless steel probe along with supporting electronics. Resolving power was 38 for DtBP and 31 for tetrachloroethylene or perchloroethylene (PCE). This instrument was placed into service at a site contaminated with PCE. The presence of PCE was confirmed by GC-MS analysis of a gas sample at a laboratory certified by the Environmental Protection Agency (ERA). This demonstrated the viability of a down-well IMS-based analyzer. 

Figure 7.10 Schematic representation of the dynamic modulus test, (a) Sample In testing device, (b) Details on the position of the LVDT (GL, gauge length d, specimen diameter). (From AASHTO T 342, Determining Dynamic Modulus of Hot Mix Asphalt [HMA], Washington, DC American Association of State Highway and Transportation Officials, 2011. With permission.)...

Experiment 6D l. Describe the TLC results on the samples in test tubes 2 and 3. What does this... 

FIGURE 10.14 The dependence of impact toughness on fracture dimension for HOPE samples in tests with varied sharp notch length a (1) and testing temperature T(2) [47],... 

As a result the percent deviation could not be calculated. Differences in the results of these two tests can be attributed to the size of the rubber sample in each test. Samples in Test A were larger in width and thickness than the Test B samples. For this reason, the initial failure occurred at the periphery of the metal disk in Test A. Since the samples in Test B were smaller, the failure occurred in the body of the rubber and produced higher test results. 

In addition, LSFR retained its tensile strength and elongation properties on a comparable basis with the other samples in tests measuring accelerated aging. 

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