石油/潤滑油中的硫和金屬測試應用報告---指南針X熒光光譜儀Compass-4294
引言
Compass4294-是一款高性能臺式能量色散X射線熒光光譜儀，能夠分析石油中的硫和重金屬含量（ppm級到百分比）。 ASTM4294描述了通過CompassRF測量油中硫的方法。本應用指南根據(jù)ASTM4294-演示了使用Compass4294的方法，硫含量通常為17ppm至5％。還證明了金屬在潤滑劑中的測試性能可以證明Compass4294符合此應用的要求。
Compass-4294還廣泛用于分析潤滑劑中的金屬，符合以下標準：
> ASTMD7751 / ASTM D6481 ---
潤滑油中添加元素（Mg，P，S，Cl，Ca，Zn，Mo）的測定
> ASTM D5059 ---
汽油中的鉛（PB）
0.010至5.0 g鉛/美制加侖
0.012至6.0 g鉛/英國加侖
0.0026至1.32 g鉛/升
測試性能
> 50 ppm硫標準物的測試性能
Unit: | ppm | Test Time: 100 seconds | ||||
Test Number | Calibration | Sulfur (ppm) | ||||
1 | Low Sulfur | 51.64 | ||||
2 | Low Sulfur | 52.26 | ||||
3 | Low Sulfur | 48.96 | ||||
4 | Low Sulfur | 51.75 | ||||
5 | Low Sulfur | 50.29 | ||||
6 | Low Sulfur | 45.20 | ||||
7 | Low Sulfur | 49.99 | ||||
8 | Low Sulfur | 52.28 | ||||
9 | Low Sulfur | 52.99 | ||||
10 | Low Sulfur | 51.64 | ||||
11 | Low Sulfur | 50.44 | ||||
12 | Low Sulfur | 50.67 | ||||
13 | Low Sulfur | 53.48 | ||||
14 | Low Sulfur | 53.34 | ||||
15 | Low Sulfur | 54.95 | ||||
16 | Low Sulfur | 52.55 | ||||
17 | Low Sulfur | 53.65 | ||||
18 | Low Sulfur | 51.94 | ||||
19 | Low Sulfur | 53.00 | ||||
20 | Low Sulfur | 51.45 | ||||
Average test results of 20 times analysis (ppm) | 51.62 | |||||
Real Value (ppm) | 50.00 | |||||
0.1％和1％硫標準的測試性能
Unit: | % | Test Time: 100 seconds | |
No. | Calibration | Sulfur | Sulfur |
1 | FUEL | 0.106 | 1.071 |
2 | FUEL | 0.106 | 1.083 |
3 | FUEL | 0.108 | 1.078 |
4 | FUEL | 0.106 | 1.074 |
5 | FUEL | 0.104 | 1.061 |
Certified Value | 0.100 | 1.000 | |
Average | 0.106 | 1.073 | |
Standard Deviation Sn | 0.001 | 0.008 | |
Error ppm | 0.006 | 0.073 | |
RSD | 1.33% | 0.77% | |
300 ppm金屬含量標準在潤滑劑中的測試性能
Unit: | PPM | Test Time: 60 seconds | ||||||||
No. | Calibration | Ca | Ti | V | Cr | Mn | Fe | Ni | ||
1 | Lubricant | 318 | 304 | 300 | 307 | 308 | 309 | 308 | ||
2 | Lubricant | 278 | 305 | 294 | 299 | 305 | 303 | 298 | ||
3 | Lubricant | 323 | 302 | 300 | 313 | 303 | 306 | 303 | ||
4 | Lubricant | 279 | 309 | 300 | 304 | 305 | 305 | 299 | ||
5 | Lubricant | 318 | 310 | 300 | 304 | 306 | 305 | 306 | ||
Certified Value | 300 | 300 | 300 | 300 | 300 | 300 | 300 | |||
Average | 303.2 | 306 | 298.8 | 305.4 | 305.4 | 305.6 | 302.8 | |||
Standard Deviation Sn | 22.643 | 3.3912 | 2.6833 | 5.1284 | 1.8166 | 2.1909 | 4.3243 | |||
Error ppm | 3.2 | 6 | -1.2 | 5.4 | 5.4 | 5.6 | 2.8 | |||
RSD | 7.47% | 1.11% | 0.90% | 1.68% | 0.59% | 0.72% | 1.43% | |||
No. | Calibration | Cu | Zn | Mo | Ag | Cd | Pb | |||
1 | Lubricant | 299 | 300 | 315 | 307 | 295 | 297 | |||
2 | Lubricant | 300 | 304 | 306 | 305 | 299 | 297 | |||
3 | Lubricant | 305 | 307 | 308 | 306 | 311 | 297 | |||
4 | Lubricant | 299 | 303 | 306 | 306 | 328 | 298 | |||
5 | Lubricant | 304 | 304 | 305 | 324 | 313 | 294 | |||
Certified Value | 300 | 300 | 300 | 300 | 300 | 300 | ||||
Average | 301.4 | 303.6 | 308 | 309.6 | 309.2 | 296.6 | ||||
Standard Deviation Sn | 2.881 | 2.51 | 4.062 | 8.0808 | 13.008 | 1.5166 | ||||
Error ppm | 1.4 | 3.6 | 8 | 9.6 | 9.2 | -3.4 | ||||
RSD | 0.96% | 0.83% | 1.32% | 2.61% | 4.21% | 0.51% | ||||
校準。
使用一系列可商購的石油標準液來校準CompassRF光譜儀。
需要特殊的樣品杯來采集標準品和樣品以進行測量
測試譜圖如下
潤滑油中金屬元素標定曲線如下
結論
根據(jù)上面獲得的測試結果，證明Compass4294能夠測量符合ASTM D4294，ISO 8754，ISO 20847，
IP336。Compass4294還被證明可以高精度和高精度地分析石油和類似基質樣品中的其他元素。
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