I want to add something to what I said in Mandarin phonology with IPA:

I am currently trying to create a simple conversion from (Hanyu) Pinyin to IPA for the Standard Mandarin pronunciation Pinyin was created for.

This conversion will be build on a table based mapping from Pinyin to IPA syllables and has some simple routines for coping with tone sandhi occurrences (see German Wikipedia on Mandarin tonsandhi).

As there are different tables floating around, I wanted to compare them and explore the different view on the syllables' initials and finals. There is not only a difference in the order of the parts, but also in how the syllables are placed under which initial and which final. E.g.

If you are in need of all syllables of Standard Mandarin (Putonghua) written in Pinyin you might come up with some seldom ones. The Xiàndài Hànyǔ Cídiǎn (现代汉语词典（第5版）商务印书馆, 北京 2005, ISBN 7-100-04385-9) for example lists syllables n and ng. The ISO 7098 norm for Pinyin then has syllables kei and rua.

Playing a bit with segmenting strings written in Pinyin I came up with a regular expression (regex) doing the job.