ɪt wʌz sˈuːn sˈʌplɪməntᵻd wɪð taɪtˈeɪniəm daɪˈɑːksaɪd, wˌɪtʃ ɪz kˈɜːɹəntli ðɪ ɐpɹˈuːvd kˈæɾɐlˌɪst ɪn ˈɔːl ʌvðə mˈɛθədz ʌv ɐnˈæləsˌɪs fɔːɹ pɹˈoʊtiːn ɪnðɪ əfˈɪʃəl mˈɛθədz ænd ɹˌɛkəmˈɛndᵻd pɹˈæktɪsᵻz ʌv ˈeɪəˌæk ˌɪntɚnˈæʃənəl.
It was soon supplemented with titanium dioxide, which is currently the approved catalyst in all of the methods of analysis for protein in the Official Methods and Recommended Practices of AOAC International.