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求助如何测量溶液中Cu离子浓度
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求助如何测量溶液中Cu离子浓度，溶液中可能还有Cu，Zn，Al,Zr离子。 [ Last edited by 153348130 on 2008-4-18 at 17:14 ] |
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ElectroWang
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看浓度吧, 很低的时候,使用ICP-MS ICP-MS (Inductively coupled plasma mass spectrometry) is a type of mass spectrometry that is highly sensitive and capable of the determination of a range of metals and several non-metals at concentrations below one part in 1012. It is based on coupling together an inductively coupled plasma as a method of producing ions (ionization) with a mass spectrometer as a method of separating and detecting the ions. ICP-MS is also capable of monitoring isotopic speciation for the ions of choice. The ICP-MS allows determination of elements with atomic mass ranges 7 to 250. This encompasses Li to U. Some masses are prohibited such as 40 due to the abundance of argon in the sample. A typical ICP-MS will be able to detect in the region of nanograms per litre to 10 or 100 milligrams per litre or around 8 orders of magnitude of concentration units. Unlike atomic absorption spectroscopy, which can only measure a single element at a time ICP-MS has the capability to scan for all elements simultaneously. This allows rapid sample processing. One of the largest volume uses for ICP-MS is in the medical and forensic field, specifically, toxicology. A physcian may order a metal assay for a number of reasons, such as suspiscion of heavy metal poisoning, metabolic concerns, and even hepatological issues. Depending on the specific parameters unique to each patient's diagnostic plan, samples collected for analysis can range from whole blood, urine, plasma, serum, to even packed red blood cells. Another primary use for this instrument lies in the environmental field. Such applications include water testing for municipalities or private individuals all the way to soil, water and other material analysis for industrial purposes. Regardless of the sample type, blood, water, etc., it is important that it be free of clots or other particulate matter, as even the smallest clot can disrupt sample flow and block or clog the sample tips within the spray chamber. |
5楼2008-04-18 19:39:08
2楼2008-04-18 17:05:12
liu5288fang 
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3楼2008-04-18 17:15:20
4楼2008-04-18 19:05:20
