A New Projection Comparator-Densitometer*

Dietert, Harry W.; Schuch, John

doi:10.1364/josa.31.000054

Cited by 14 publications

(1 citation statement)

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“…The laboratory equipment included the grating spectrograph (6), Multisource unit (4, 5), and comparator-densitometer (3) supplied by the Applied Research Laboratories.…”

Section: Equipmentmentioning

confidence: 99%

Spectrochemical Determination of Copper

Spicer¹

1948

Anal. Chem.

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While, strictly speaking, the results of this study are applicable only in the Pittsburgh area, the conclusions may be of interest to others with similar problems, working under more or less comparable conditions. There is no reason for believing the control of frequency of the Pittsburgh power supply to be unique and, accordingly, the frequency errors revealed in this study are probably representative of those to be expected in using the line

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“…The laboratory equipment included the grating spectrograph (6), Multisource unit (4, 5), and comparator-densitometer (3) supplied by the Applied Research Laboratories.…”

Section: Equipmentmentioning

confidence: 99%

Spectrochemical Determination of Copper

Spicer¹

1948

Anal. Chem.

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Internal standard method of spectrographic analysis as applied to the determination of lead in high purity zinc

Griffith¹,

Kirkbride

1946

J. Chem. Technol. Biotechnol.

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tines are sfigtitly ttiirtrrcr. The rnnt.erinI was dcfitiitely deficietrt iic ptdssium nod probably slightly too low in ninng~rne~e to producc Tho strong' copper lines nre tlie result of bordeaux mixture yprnycd on the leaves to protect them froni blight nnd not removcd completely in the clenning process.SESSITIVITI-ASD ACCURACY OF JIETIIOD SOIIIC idea of t1i.e sensitivity nnd nccurncy of tho uiethod may bc gathered from the spectrogrnins No. 8 of spills impregtinted with ~1lougli of D s~rnclortl solution to sup~ily 04003 g. potnssium, 0.0003 g. cnlcium, 0.00006 g. mngncsiuni, O.ooOo6 g. sotlium, 0*000006 g. iron nnd 0.000001 g. ninngnncse, irnd by co~nparing spectrograms Nos. 8 nntl 9 hetween which there is n ten per cent. difference iu nmount of ench elcriierit coiiccriird. The mount of filter pnpcr burnt for spectrogrirnis contained nbout 0.000001 g. cnlciuni, m d ahont 0 .~~1 g. sotliuin. full ctop. . ' ' AORSOWLEDDIIEXTS ' The I~iiilding up o f this nicthod hCi s been bnsed Irrrgely on thc e'xpcncnrc of othcrs who used it in its rnrious stirges much more tlpn the writer. It wis accelerated Iiy the provisioli of urlclitio~ial ivnrkcrs uiidcr :k,&l!t mode by thr Xgricuiturni Xesearch b I i U C i 1 to nugtnelrt i i joint team coniposcd of the Biuclicinistry Scckiori of thc Enst Xnfliit): Hfsenrcli Stotion wid wurlicrs, inentioned below, front the Itescarcl Instittrtc of Plant I'hysiology, Iniprrinl College of' Scietice and Technolo~:y. A special debt is due to Major S. G. Thompson wlto uscd it it1 its cnrlieat nnd most troublesome stnges and who lind the iden of usiiig n coniniercinl oxy-ncetyletic blowpipe indepenclently of t.he writer. He 3130 invcstignted the possibilities nnd showed the value of thc method ng n inenns of dingnosis of mincrnl deficiencies in plnnts. Mrs. W. 0. Roberts t.rninec1 i~ number of nssistntits in its use :itid iupervised their routine work. Dr. 13. D. Bolas contributed the iden of wnxing the pnpers to innkc tlic folds of the spills stick together.Dr. D. tV. Goodrrll tins used the metliod xnninly for quantitative work. klr. niches usetl it for ib short tiinc. bliss 15. Ford Inns rfoirc routine rrnnlyses continuously for 34 years irtitl lies lrrtterly becri responsihle for the routine spcctrogrirphic ;iiitrly&, and mutine niinlysca hnvc been ilo~ic for n shorter le~igth of time by the hfisvcs

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Einfacher ausbau eines schnellphotometers zu einem automatischen und schreibenden photometer

Schuhknecht¹

1948

Spectrochimica Acta

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A New Projection Comparator-Densitometer*

Cited by 14 publications

References 0 publications

Spectrochemical Determination of Copper

Spectrochemical Determination of Copper

Internal standard method of spectrographic analysis as applied to the determination of lead in high purity zinc

Einfacher ausbau eines schnellphotometers zu einem automatischen und schreibenden photometer

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