div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: UMeprintsumedumy87351AllpdfColorimetric Method DR890 colorimeter procedures manual 1997—2000 where samples were digested at 1500C for two hours with potassium dichromate src=https:reader033vdocumentsnetreader033viewer2022052520608f967067fb1a1dad78769ehtml5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdiv