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Frans_M_Everaerts_Isotachophoresis_378342.pdf

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SEPARATION USING A THERMOMETRIC DETECTOR 29 7<br />

TABLE 12.3<br />

STEP HEIGHTS FOR SOME ANIONS OBTAINED IN THE OPERATIONAL SYSTEMS LISTED IN<br />

TABLES 12.1 and 12.2<br />

The values are the step heights found in the isotachopherograms in the linear trace of the thermo-<br />

couple signal. The values are given in millimetres and refer to 0 fiA. The experiments were carried<br />

out with a current stabilized at 70 @A.<br />

-<br />

Ionic species System* Ionic species System*<br />

Adipic acid<br />

Acetic acid<br />

Acetylsalicylic acid<br />

Allomucic acid<br />

Azelaic acid<br />

Benzoic acid<br />

Benzoic acid, rn-amino<br />

Benzoic acid, o-amino<br />

Benzoic acid, p-amino<br />

Benzyl-dl-aspartic acid<br />

Benzoic acid, 5-bromo-<br />

2,3-dihydroxy<br />

Butyric acid<br />

Cacodylic acid<br />

Caffeic acid<br />

Capric acid<br />

Caproic acid<br />

Caprylic acid<br />

Carbonic acid<br />

Chloric acid<br />

Chromic acid<br />

Cinnamic acid<br />

Citric acid<br />

Crotonic acid<br />

Dichromic acid<br />

2,4-Dihydroxybenzoic acid<br />

EDTA<br />

Formic acid<br />

D-Galacturonic acid<br />

Glucuronic acid<br />

Glutamic acid<br />

Glycolic acid<br />

Glyoxylic acid<br />

Guanidoacetic acid<br />

Hippuric acid<br />

Hydrofluoric acid<br />

a-Hydroxybutyric acid<br />

4,5-Imidazoledicarboxylic<br />

acid<br />

Indolylacetic acid<br />

Iodic acid<br />

Isovaleric acid<br />

A B<br />

334 252<br />

366 281<br />

474 380<br />

319 250<br />

365 274<br />

430 340<br />

454 340<br />

408 -<br />

454 350<br />

531 440<br />

460 316<br />

428 356<br />

620 400<br />

526 420<br />

51 1 400<br />

478 386<br />

510 400<br />

520 sl.* 320 sl.<br />

24 3 190<br />

259 173<br />

500 368<br />

292 200<br />

416 3 26<br />

249 174<br />

459 354<br />

3 34 285<br />

276 216<br />

n.s.m.- -<br />

509 420<br />

476 386<br />

360 286<br />

399 290<br />

n.s.m. n.s.m.<br />

490 391<br />

271 218<br />

470 375<br />

326 240<br />

n.s.m. n.s.m.<br />

358 290<br />

460 360<br />

2-K&ogulonic acid<br />

Kynurenic acid<br />

Lactic acid<br />

Laevulinic acid<br />

Maleic acid<br />

dl-Malic acid<br />

Malonic acid<br />

Mandelic acid<br />

Methacrylic acid<br />

Molybdic acid<br />

Naphthalene-2sulphonic<br />

acid<br />

Nicotinic acid<br />

Nitric acid<br />

rn-Nitrobenzoic acid<br />

p-Nitrobenzoic acid<br />

Nitrous acid<br />

Orotic acid<br />

Orthophosphoric acid<br />

Oxalic acid<br />

Pelargonic acid<br />

Periodic acid<br />

Peroxodisulphuric acid<br />

Phenidon<br />

Phenylacetic acid<br />

o-Phthalic acid<br />

Picric acid<br />

Pimelic acid<br />

Propionic acid, p-chloro<br />

Pycrolonic acid<br />

Pyrazine-2,3-dicarboxylic<br />

acid<br />

Pyrazole-3,5-dicarboxylic<br />

acid<br />

F'yrophosphoric acid<br />

Pyrosulphuric acid<br />

Pyrosulphurous acid<br />

Salicylic acid<br />

Succinic acid<br />

Sulphamic acid<br />

Sulphanilic acid<br />

Sulphosalicylic acid<br />

A B<br />

496<br />

470<br />

391<br />

430<br />

312<br />

286<br />

280<br />

456<br />

4 04<br />

335<br />

496<br />

436<br />

220<br />

440<br />

442<br />

217<br />

454<br />

408<br />

236<br />

494<br />

358<br />

212<br />

n.s.m.<br />

44 8<br />

328<br />

446<br />

345<br />

399<br />

n.s.m.<br />

298<br />

301<br />

-<br />

224<br />

224<br />

408<br />

3 04<br />

3 04<br />

420<br />

283<br />

395<br />

383<br />

314<br />

-<br />

216<br />

222<br />

204<br />

364<br />

312<br />

185<br />

358<br />

342<br />

174<br />

340<br />

345<br />

170<br />

310<br />

266<br />

180<br />

393<br />

250<br />

162<br />

n.s.m.<br />

366<br />

246<br />

350<br />

264<br />

316<br />

-<br />

-<br />

235<br />

204<br />

-<br />

172<br />

323<br />

224<br />

244<br />

344<br />

228<br />

(Continued on p.298)

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