参考价栻/p>面议
型号
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英国样本
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Horizon稳定同位素质谱仪是日常分析各种样品中C,N,O,S,H同位素比值的**设备,配合元素分析仪,气相色谱,水平衡和碳酸盐多功能气体在线制备系统等附件的连接,完成各种样品的C,N,O,S,H的同位素比值分析,比如蜂蜜掺假的鉴别、/p>
Nu Horizon 稳定同位素质谱,秉承Nu MC-ICP-MS**的“Variable Zoom Optics”(离子变焦?*技术,使得气体稳定同位素的精度更高,线性范围更宽,稳定性更好、/p>
Nu horizon技术特点如下:
离子束同时收集使?-6个法拉第杯;
对于CO2,有效磁场偏转半径达30cm大质量色散;
所有质量数离子都以?KV的加速电位测量;
具有整体聚焦透镜的高效率离子源;
完全差分泵为标准,优化泵双入口和连续流的应用:/p>
电磁铁与霍尔探头控制稳定:/p>
高效率,窄狭缝,深法拉第杯;
能够测量信号高于50V的放大器:/p>
完全自动诊断的电子部件;
所有的质量数包括H2,都在完全的偏转半径下测量,所以完全不需要额外的离子光学元件用来去除低低能量He+离子的影响(在HD+离子束中)、/p>
集成的离子源烘烤炉(温度可达200℃)、/p>
完整的连续流接口解决方案9/p>
元素分析仪联用稳定同位素质谱方案:/p>
气相色谱联用稳定同位素质谱方案;
痕量气体预浓缩方案;
碳酸盐及水平衡装置、/p>
等等、/p>
同位素质谱,对于使用者来说更有意义的技术指标在于仪器的背景信号,响应系数,线性范围等、/p>
所有其他的参数实际都是为以下技术指标服务的、/p>
Reference Gas tests参考气测试
灵敏?/span>
测试 |
条件 |
技术指栆/span> |
CO2灵敏?/span> |
CO2调谐'/span>500uA trap(/span> He carrier pressure 7.5 Psi 载气He压力7.5Psi CO2压力7psi |
大于15nA |
线?/span>Linearity
测试 |
条件 |
技术指栆/span> |
CO2 45/44(C13) |
2 to 40 nA Mass 44 beam 5 measurement average |
Linearity<0.020?/span>/nA Error<0.010?/span> |
CO2 46/44(O18) |
Linearity<0.020?/span>/nA Error<0.010?/span> |
|
N2 29/28(N15) |
2 to 40 nA Mass 28 beam 5 measurement average |
Linearity<0.020?/span>/nA Error<0.010?/span> |
CO 29/28(C13) |
2 to 40 nA Mass 28 beam 5 measurement average |
Linearity<0.030?/span>/nA Error<0.010?/span> |
CO 30/28(O18) |
Linearity<0.030?/span>/nA Error<0.010?/span> |
CO2?nA?0nA的范围都能有很好的线性,会大大提高测试效率、/p>
Internal stability
参考气重复测试精度如下9/span>
test |
condition |
specification |
CO2 45/44 (C13) |
Standard deviation 45/44 ratio in 10 CO2 pulses Mass 44 beam at 15nA |
SD<0.060?/span> Range<0.2 |
CO2 46/44(O18) |
Standard deviation 46/44 ratio in 10 CO2 pulses Mass 44 beam at 15nA |
SD<0.060?/span> Range<0.2 |
N2 29/28(N15) |
Standard deviation 29/28 ratio in 10 N2 pulses Mass 28 beam at 15nA |
SD<0.060?/span> Range<0.2 |
CO 29/28(C13) |
Standard deviation 29/28 ratio in 10 CO pulses Mass 28 beam at 15nA |
SD<0.150?/span> Range<1.0 |
CO 30/28(O18) |
Standard deviation 30/28 ratio in 10 CO pulses Mass 28 beam at 15nA |
SD<0.150?/span> Range<1.0 |
H2 3/2(HD) |
Standard deviation 3/2 ratio in 10 H2 pulses Mass 2 beam at 15nA |
SD<0.500?/span> Range<2.0 |
EA (CN) and EA (CNS)
test |
condition |
specification |
CO2 Stability |
50ug(Elemental weight of C in sample)-10 samples |
Standard Deviation 0.10?/span> |
CO2 linearity |
15 to 150ug(Elemental weight of C)-10samples |
Standard deviation 0.30?/span> |
N2 stability |
100ug(Elemental weight of N in sample)-10 samples |
Standard deviation 0.15?/span> |
N2 linearity |
20 to 200ug(Elemental weight of C)-10samples |
Standard deviation 0.30?/span> |
SO2 stability(S34/S32) |
100ug(Elemental weight of N in sample)-10 samples |
Standard deviation 0.20?/span> |
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