THE COLORIMETRIC DETERMINATION OF LEAD IN THE PRESENCE OF IRON WITH SOME NOTES ON THE PREPARATION OF LEAD FREE REAGENTS BY COPRECIPITION WITH FERRIC HYDROXIDE
✍ Scribed by Wilkie, John M.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1909
- Weight
- 418 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0368-4075
No coin nor oath required. For personal study only.
✦ Synopsis
Forbcnfnbriken ninnufacturcd at present tlircc different sizes of mctcrs, for pipe3 witti n diaiiictcr from 60, 100, and 150 111111., wliicli could be used for nny sizc of piping witliout nflccting tlic nccurncy of tlic mctcr. Tlic priccs wcrc about tho snnic as tlioso of otlicr nictcrs obtniiinblc in tllc market. Tho pnrnboln wns nindo on tlic lntlic; tliat Iind, of course, to be doiic wit11 grcotcst cam, ns tlic esnctncss of tlic mctcr dcpended on this poiiit. It \ws impossible to test tlio nccurncy of tlic metcr by R menwring instrument, but tlic cone IVRS tcvtcd in tlic following wny :-TIM steam mctcr is fised bcliind R norninl meter xvliicli lins lieen tested in nll positioiis of tlio disc by coiidensing tho stcnni ivliicli lins posscil tlirougli nnd wcigliing tlic watcr. Tliroiigli liotli instriinicnts tlic snnic quantity of stcnui is pnssing nnd coiiscqiicntly tlic pOsitiOIiH of tlic discs sliould bc tlic sniiic with all quantities of steam. \'iicncrer it is i~npossiblc to obtniii cxnct ngrccniciit by clinriging tlic wciglit, tlic conc is cliscnrtlcd DY usclcss.
Tlic following tnblc shows tlic niaxinium of stenill pnssing tlirougli in 1 hour for tlic thrco different kinds of nictcrs :-
Kp.