Method of photometric analysis

Claim 1

IN THE ANALYSIS OF FLUID MATERIALS TO DETERMINE THE PERCENTAGE CONTENT OF A PRESELECTED COMPONENT IN SAID FLUID MATERIALS ON THE BASIS OF THE SELECTIVE ABSORPTION OF LIGHT BY SAID COMPONENT IN THE COURSE OF THE TRANSMISSION OF A BEAM OF LIGHT DIRECTED THROUGH A LIGHT-TRANSMITTING SAMPLE CELL CONTAINIONG A REPRESENTATIVE SAMPLE OF SAID MATERIALS AND THEREAFTER TO LIGHT-MEASURING MEANS, WHEREIN A PRESELECTED ESTABLISHED VALUE OF LIGHT TRANSMITTED THROUGH A GIVEN MASS OF THE COMPONENT ANALYZED FOR IS CHOSEN AS THE DATUM CONDITION OF TRANSMITTED LIGHT, THE METHOD OF OBTAINING A QUANTITATIVE MEASURE OF THE AMOUNT OF SAID COMPONENT ANALYZED FOR IN SAID SAMPLE COMPRISING INTERPOSING OPTICALLY INSERIES WITH SAID SAMPLE CELL AHEAD OF SAID LIGHT-MEASURING MEANS A LIGHT-TRANSMITTING REBALANCING CELL CONTAINING THEREIN A QUANTITY OF SAID COMPONENT ANALYZED FOR, ADJUSTING SAID QUANTITY OF SAID COMPONENT ANALYZED FOR CONTAINED IN SAID REBALANCING CELL TO THEREBY ATTAIN SAID DATUM CONDITION OF TRANSMITTED LIGHT AS DETECTED BY SAID LIGHT-MEASURING MEANS, AND OBTAINING AN INDICATION OF SAID AMOUNT OF SAID COMPONENT ANALYZED FOR IN SAID SAMPLE AS A FUNCTION OF SAID QUANTITY OF SAID COMPONENT ANALYZED FOR CONTAINED IN SAID REBALANCING CELL WHEN SAID DATUM CONDITION OF TRANSMITTED LIGHT IS REACHED.