ICP及AAS对比测试分析
Condition | Setting |
Power (kW) | 1.50 |
Plasma flow (L/min) | 15.0 |
Auxiliary flow (L/min) | 1.50 |
Nebulizer flow (L/min) | 0.60 |
Viewing height (mm) | 8 |
Replicate read time (s) | 5 – 15 |
Instr stabilization delay (s) | 15 |
Sample introduction Settings | |
Sample uptake delay (s) | 15 |
Pump rate (rpm) | 15 |
Rinse time (s) | 15 |
Fast pump (Samp delay/rinse) | OK |
General Settings | |
Replicates | 1 |
标准物质名称 | 所含元素理论值(mg/kg) | ||
Cu | Pb | Zn | |
GBM999-5 | 486 | 525 | 120 |
GBM306-8 | 5868 | 392 | 791 |
GBM399-5 | 29424 | 21173 | 9493 |
标准物质 | 元素 | 样品 | 仪器分析结果(mg/kg) | 相差 (mg/kg) | 相對偏差 (%) | ||
ICP | AAS | ||||||
GBM999-5 | Cu | 1 | 473 | 497 | 24 | 4.9 | |
2 | 485 | 518 | 33 | 6.6 | |||
3 | 491 | 501 | 10 | 2.0 | |||
Pb | 1 | 529 | 551 | 22 | 4.1 | ||
2 | 565 | 562 | 3 | 0.5 | |||
3 | 546 | 561 | 15 | 2.7 | |||
Zn | 1 | 131 | 121 | 10 | 7.9 | ||
2 | 129 | 126 | 3 | 2.4 | |||
3 | 120 | 124 | 4 | 3.3 | |||
GBM306-8 | Cu | 1 | 5696 | 5988 | 292 | 5.0 | |
2 | 5577 | 5899 | 322 | 5.6 | |||
3 | 5591 | 5929 | 338 | 5.9 | |||
Pb | 1 | 413 | 411 | 2 | 0.5 | ||
2 | 404 | 406 | 2 | 0.5 | |||
3 | 407 | 407 | 0 | 0.0 | |||
Zn | 1 | 824 | 789 | 35 | 4.3 | ||
2 | 804 | 754 | 50 | 6.4 | |||
3 | 790 | 743 | 47 | 6.1 | |||
GBM399-5 | Cu | 1 | 29722 | 30512 | 790 | 2.6 | |
2 | 29320 | 29485 | 165 | 0.6 | |||
3 | 29829 | 30310 | 481 | 1.6 | |||
Pb | 1 | 21441 | 21676 | 235 | 1.1 | ||
2 | 21255 | 21660 | 405 | 1.9 | |||
3 | 21545 | 20985 | 560 | 2.6 | |||
Zn | 1 | 9380 | 9497 | 117 | 1.2 | ||
2 | 9227 | 9122 | 105 | 1.1 | |||
3 | 9395 | 9256 | 139 | 1.5 |
原文由 sasha(540019326qq) 发表:原文由 依风1986(xurunjiao5339) 发表:
老师,还有问题请教你,同一个标准物质不同仪器之间比对,相对偏差都是小于10%吗?应该还要分清修护该标准物质是高含量还是低含量吧?相对偏差小于10%,有标准依据吗?还是自己内部规定的SOP?
这个问题我也想问,好像就是行业规定,都这么说。比方说,实验室间的比对,结论都会注:偏差小于10%,结果满意!至于谁规定的,无从考证。都这么说,也就成为一种规定了,呵呵!