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Sampling two-stage

Several manual and continuous analytical techniques are used to measure SO2 in the atmosphere. The manual techniques involve two-stage sample collection and measurement. Samples are collected by bubbling a known volume of gas through a liquid collection medium. Collection efficiency is dependent on the gas-liquid contact time, bubble size, SO2 concentration, and SO2 solubility in the collection medium. The liquid medium contains chemicals which stabilize SO2 in solution by either complexation or oxidation to a more stable form. Field samples must be handled carefully to prevent losses from exposure to high temperatures. Samples are analyzed at a central laboratory by an appropriate method. [Pg.200]

Air monitoring normally involves two stages -sampling of the substance, followed by analysis. Sampling and analytical techniques can be divided into several categories based on factors such as time and the method of collection and analysis ... [Pg.87]

When weak acids contain more than one ionizable H atom, as in phosphorous acid (H3PO3), reaction witii OH occurs in a series of steps. Neutralization of H3PO3 proceeds in two stages. (Sample Integrative Exercise 16)... [Pg.677]

Comparing results obtained by concerned decomposition techniques with the data certified (recommended), the two-stage microwave sample preparation procedure is preferable. [Pg.287]

There are several techniques available for SFA to drive a sample along the normal direction and to position it to a specified site. A common feature of these techniques is to employ a multi-stage driving system of increasing sensitivity. The apparatus developed by Israelachivili s team, for example, uses a two-stage screw as the coarse and medium control, which gives positioning accuracy of 1 /rm and 1 nm. [Pg.16]

FIGURE 11.9 Tensile fractured samples show the texture of XNBR vulcanizates (a) 75 25 EPDM/XNBR (b) 75 25 EPDM/XNBR (c) 50 50 EPDM/XNBR (one stage) (d) 50 50 EPDM/XNBR (two stage) (e) 25 75 EPDM/XNBR (one stage) (f) 25 75 EPDM/XNBR (two stage). (From Naskar, M., Debnath, S.C., and Basu, D.K. Rubber Chem. TechnoL, 75, 309, 2002.)... [Pg.315]

Models such as those given in this section can be extended to more than two stages of sampling ( ). [Pg.90]

See other pages where Sampling two-stage is mentioned: [Pg.377]    [Pg.86]    [Pg.86]    [Pg.87]    [Pg.87]    [Pg.62]    [Pg.196]    [Pg.222]    [Pg.109]    [Pg.110]    [Pg.377]    [Pg.130]    [Pg.2488]    [Pg.953]    [Pg.910]    [Pg.418]    [Pg.377]    [Pg.86]    [Pg.86]    [Pg.87]    [Pg.87]    [Pg.62]    [Pg.196]    [Pg.222]    [Pg.109]    [Pg.110]    [Pg.377]    [Pg.130]    [Pg.2488]    [Pg.953]    [Pg.910]    [Pg.418]    [Pg.548]    [Pg.248]    [Pg.254]    [Pg.165]    [Pg.287]    [Pg.127]    [Pg.297]    [Pg.298]    [Pg.208]    [Pg.399]    [Pg.400]    [Pg.801]    [Pg.25]    [Pg.232]    [Pg.149]    [Pg.234]    [Pg.313]    [Pg.32]    [Pg.84]    [Pg.90]    [Pg.928]    [Pg.53]    [Pg.129]    [Pg.129]    [Pg.498]   
See also in sourсe #XX -- [ Pg.377 ]

See also in sourсe #XX -- [ Pg.377 ]

See also in sourсe #XX -- [ Pg.377 ]



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Two-sample

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