     <span class="stringliteral">&#39;BA&#39;</span>,  <span class="comment"># barium ion</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;                                              <span class="stringliteral">&#39;RU&#39;</span>,  <span class="comment"># ruthenium ion</span></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;                                              <span class="stringliteral">&#39;SAH&#39;</span>,  <span class