Arsenic Species Analysis at Trace Level by High Performance Liquid Chromatography with Inductively Coupled Plasma Mass Spectrometry

<table class="fixed-width table-group" id="tab2"><tr><td><table class="table"><colgroup><col style="width:4.19em"/><col style="width:10.82em"/><col style="width:5.94em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Species</td><td class="align_center">Formula</td><td class="align_center">p<i>Ka</i></td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">AsC</td><td class="align_center">(CH<sub>3</sub>)<sub>3</sub>As<sup>+</sup>CH<sub>2</sub>CH<sub>2</sub>OH</td><td class="align_center">−</td></tr><tr><td class="align_left">AsB</td><td class="align_center">(CH<sub>3</sub>)<sub>3</sub>As<sup>+</sup>CH<sub>2</sub>COOH</td><td class="align_center">2.18</td></tr><tr><td class="align_left"><span style="width: 23.7305ptpx;"><svg height="12.0836pt" id="M17" style="vertical-align:-0.2455997pt" version="1.1" viewbox="-0.0498162 -11.838 23.7305 12.0836" width="23.7305pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M673 0V28C608 34 594 43 563 129C499 303 432 494 370 665L339 656L132 132C98 43 84 37 20 28V0H238V28C162 35 154 45 175 108C188 150 203 192 219 237H432C454 176 474 122 487 83S491 36 428 28V0H673ZM418 280H234C265 362 296 450 328 535H330L418 280Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.774,0)"><path d="M319 325C317 349 306 409 297 431C277 440 250 449 209 449C117 449 57 389 57 319C57 243 122 209 182 182C232 159 261 135 261 91C261 48 227 21 190 21C130 21 85 79 68 145L41 140C41 104 51 36 58 22C75 7 121 -12 172 -12C252 -12 337 35 337 126C337 195 286 231 210 262C166 281 126 304 126 348C126 388 152 417 191 417C240 417 274 378 294 318L319 325Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,13.597,-5.741)"><path d="M308 0V33C225 38 217 44 217 128V521C217 605 225 612 308 617V650H39V617C122 612 130 605 130 521V128C130 44 122 38 39 33V0H308Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,16.764,-5.741)"><path d="M308 0V33C225 38 217 44 217 128V521C217 605 225 612 308 617V650H39V617C122 612 130 605 130 521V128C130 44 122 38 39 33V0H308Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,19.93,-5.741)"><path d="M308 0V33C225 38 217 44 217 128V521C217 605 225 612 308 617V650H39V617C122 612 130 605 130 521V128C130 44 122 38 39 33V0H308Z"></path></g></svg></span></td><td class="align_center">H<sub>3</sub>AsO<sub>3</sub></td><td class="align_center">9.28</td></tr><tr><td class="align_left">DMA</td><td class="align_center">(CH<sub>3</sub>)<sub>2</sub>AsO(OH)<sub>2</sub></td><td class="align_center">6.3</td></tr><tr><td class="align_left">MMA</td><td class="align_center">CH<sub>3</sub>AsO(OH)<sub>2</sub></td><td class="align_center">2.6, 8.2</td></tr><tr><td class="align_left"><span style="width: 20.7437ptpx;"><svg height="12.0836pt" id="M18" style="vertical-align:-0.2455997pt" version="1.1" viewbox="-0.0498162 -11.838 20.7437 12.0836" width="20.7437pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M673 0V28C608 34 594 43 563 129C499 303 432 494 370 665L339 656L132 132C98 43 84 37 20 28V0H238V28C162 35 154 45 175 108C188 150 203 192 219 237H432C454 176 474 122 487 83S491 36 428 28V0H673ZM418 280H234C265 362 296 450 328 535H330L418 280Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.774,0)"><path d="M319 325C317 349 306 409 297 431C277 440 250 449 209 449C117 449 57 389 57 319C57 243 122 209 182 182C232 159 261 135 261 91C261 48 227 21 190 21C130 21 85 79 68 145L41 140C41 104 51 36 58 22C75 7 121 -12 172 -12C252 -12 337 35 337 126C337 195 286 231 210 262C166 281 126 304 126 348C126 388 152 417 191 417C240 417 274 378 294 318L319 325Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,13.597,-5.741)"><path d="M698 650H468V617C551 609 555 599 536 543C506 457 432 264 379 129H377C311 297 238 488 212 560C196 604 198 609 271 617V650H21V617C80 612 98 603 127 532C183 396 268 173 335 -9H370C445 196 551 450 578 511C615 602 630 609 698 617V650Z"></path></g></svg></span></td><td class="align_center">H<sub>3</sub>AsO<sub>4</sub></td><td class="align_center">2.3, 6.8, 11.6</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>p<i>Ka</i> values and formulas of arsenic species [<a href="/journals/ijac/2019/3280840/#B23" target="_blank">21</a>].</div>

International Journal of Analytical Chemistry

tab2

Table 2

Table 2: Arsenic Species Analysis at Trace Level by High Performance Liquid Chromatography with Inductively Coupled Plasma Mass Spectrometry 