主题：【求助】ICP-MS可以磷酸进样吗?

没听说用磷酸做进样介质的，一般都是用硝酸。

磷酸粘性很大，30%浓度太高了，可以的话多稀释一些

原文由 a_lei82 发表:
如题,我想问一下,ICP-MS可以不可以磷酸介质进样,磷酸浓度低于30%可以直接进吗?

浓磷酸至少要稀释100倍才能进ICPMS。

浓磷酸要稀释100倍才能进样，

是测定磷酸中的杂质,大家谁知道怎么处理吗?

原文由 a_lei82 发表:
是测定磷酸中的杂质,大家谁知道怎么处理吗?

对85酸应稀释80-100倍后进样，可试试标准加入法测其中的杂质。

原文由 a_lei82 发表:
如题,我想问一下,ICP-MS可以不可以磷酸介质进样,磷酸浓度低于30%可以直接进吗?

What level of acid concentration can be used in ICP?
Below mentioned list gives an overview of the acidic compounds level that can be used in ICP . These are general recommendation and incase of any specific compounds refer to Agilent

Nitric acid: Up to 40%. This is most suitable for ICP-MS analysis.

Hydrochloric acid: Up to 18%. However, avoid using if possible. As chlorine compounds may cause blockages, if used, evaporating the hydrochloric acid is recommended. However, care is required as metallic chlorides may also volatize.

Hydrofluoric acid: Up to 30% if a hydrofluoric acid resistant kit is used.

Sulphuric acid: Up to 1%. Use is strongly discouraged.

Phosphoric acid: Up to 0.1%. Use is strongly discouraged.

Nitrohydrochloric acid: Dilute by 3 to 10 times. Treating in the same way as hydrochloric acid is recommended.

进来学习一下，收获不小。

应该不可以的

若用磷酸进样的话,则标样也应是以磷酸为介质的,不过直接进样

可进行半定量分析….根据样品的特性,具体问题具体分析…..