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Rapid separation and determination of mixtures of L-ascorbic acid, nitrite, sulfite, oxalate, iodide and thiosulfate by conventional ion chromatography is often difficult due to incomplete separation of L-ascorbic acid and nitrite from the water peak when using eluents giving short elution times for iodide and thiosulfate. Separation of the six species within about 15 min has been achieved by isocratic elution using a resin-based ion-exchange column with a carbonate eluent containing a trace amount of 1,3,5-benzenetricarboxylic acid (BTA) and fluorescence measurement of cerium(III) formed via postcolumn reactions of the separated sample species with cerium(IV). Calibration plots of peak height versus concentration were linear up to 10.0 mM (1.76 ppm) for L-ascorbic acid, 8.0 mM (0.37 ppm) for nitrite, 8.0 mM (0.70 ppm) for oxalate, 80.0 mM (10.2 ppm) for iodide and 25.0 mM (2.80 ppm) for thiosulfate, whilst the sulfite calibration was linear up to 25.0 mM (2.00 ppm) when peak area was plotted against concentration. Detection limits (defined as S /N 5 3) were 18 ppb for L-ascorbic acid, 4 ppb for nitrite, 16 ppb for sulfite, 7 ppb for oxalate, 72 ppb for iodide and 37 ppb for thiosulfate. The proposed method was applied successfully to the determination of L-ascorbic acid, nitrite, sulfite, oxalate, iodide or thiosulfate in water samples.

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A 2-D torus network is one of a most popular network in the area of parallel processing. Some algorithms have been proposed based on the turn model in past. However, most of those methods cannot be applied to torus network without modifying. In this paper, we propose the North-South First Routing (NSF Routing) which combined the North First method (NF) and the South First method (SF). NF and SF are the part of the algorithms by a Turn model. NSF Routing is applicable to 2-D Torus. Moreover, performance is evaluated by a software simulation. As a result, it was shown that a throughput improves in some communication patterns.

The needed time to send and receive a message among two nodes in an interconnection network has a fundamental role in determining the performance of this network. Therefore, taking a short period of time to send a packet between a source and destination nodes indicates a good performance network with less congestion and latency. Besides, processing data in short-term help in providing fast solutions for many complex problems. Thus,

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