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Sur la stabilité thermique des étalons analytiques. III
\‘oL.
15 (1956)
Ihns cctte troisihw s&k. nous l)r&xntons une 4tuclch rchtivc ;uis 12 corps suivants: lwrniangnnatc clc potassi~tm, su1Iatc dc chium(I\‘), ioclurc dc lJotnssiurn, lwomatc dc potassium, osxlato clc sodium, lqw.q~llosphatc dc ioclatc clc potxssium, sodium, sulfate cl’nluminium, molylxlate cl’ammonium, citrate dc sodium, acide tl-tartricluc ct lwrosyclc clc socliunl. Ccs substances ont dt& chuff~cs sur Ii1 thcrmobalnncc h ~nrcgistrcnicnt lhotograpl~icluc rl In vitcssc de .300° par hcurc et avcc clcs poids de sulxtancc dc l’ordrc clc 20~) mg. Pcrniwzgiwdc CC SCI ClYht:llllhC
dz prAssirrm ilIlll~~llT
c:t IV2
YTtlCllL
pls
tl’cau tic mcluillajic. Sx courlw tic tlwrriic~lpsu (C.;lg. I) IIltll(ltlC Clll’ll CSt htill>ll! JllS<]tl’h 2j.5”; CllC part tollJoll~~ Iloli~0~ltilIClllcIlt; Cc: Il’cst qcx VCIS 110’ qiw I’on obwrvc iin l&gcr gain tic poids. Iail pcrtc d’O.S~giXlc chl ilSBC/.brutnlc ct bc manifchtc cntrc 2.15 ct ~z95’~.Alors cornincxxx iln palicr lcntcmcnt clkruissant jusquc vcrs G30’. lhtrc 2.+5” ct 3ooq, il y .7 unc pcrtc tl’cnviron 1 iltomc tl’oxyg:bnc par mchSc~~Ic ct Ia pcrtc glol~nlc jusqu’h 700” s’dlhvc Ii 3 atomcs tl’oxygirnc pour 2 rnrdbc~~lcr tic pcrmangiinatc 1-c prodtiit Cinal nolr apib 700” csL;uw~rdnicnt Iln m&langc cl’oxydrn dc mang;in&c ct clc potnssirim. Nous avons obscrv& avcc Ic prisriic tic hei Rcrnmc uric bnnclc trC=s forte pour 897 cm-l ct IIIIC’ Ixinclc fniblc pour 838 cm’*,
Sdfntc
de cc?‘vitcm (IV)
Ix prcduit commcrcinl quc nous iivonb CII cn main5 n’cst pas cl&fin1 mnis so cowportc conimc un m6lnngc tic tdtrirhytlratc et clc scl contcnnnt c’n rnoycnnc 3.1 C-I,0 itnhvtlrc. au Ilcu clc ‘1. Un tcl rndlangc nc conscrvc son quc jusqu’lr ,li”. II SC cl&h~tlratc poicls 1901979 (I;l&‘. 2). Lc procluit J USqU’i irnhydrc n’cst pas stnblc pendant longtcmps CL tK!s 3000, il pcrd Icntcmcnt de l’aullyclriclc _.
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11IcscI~ic
15 (1956)
Ihns cctte troisihw s&k. nous l)r&xntons une 4tuclch rchtivc ;uis 12 corps suivants: lwrniangnnatc clc potassi~tm, su1Iatc dc chium(I\‘), ioclurc dc lJotnssiurn, lwomatc dc potassium, osxlato clc sodium, lqw.q~llosphatc dc ioclatc clc potxssium, sodium, sulfate cl’nluminium, molylxlate cl’ammonium, citrate dc sodium, acide tl-tartricluc ct lwrosyclc clc socliunl. Ccs substances ont dt& chuff~cs sur Ii1 thcrmobalnncc h ~nrcgistrcnicnt lhotograpl~icluc rl In vitcssc de .300° par hcurc et avcc clcs poids de sulxtancc dc l’ordrc clc 20~) mg. Pcrniwzgiwdc CC SCI ClYht:llllhC
dz prAssirrm ilIlll~~llT
c:t IV2
YTtlCllL
pls
tl’cau tic mcluillajic. Sx courlw tic tlwrriic~lpsu (C.;lg. I) IIltll(ltlC Clll’ll CSt htill>ll! JllS<]tl’h 2j.5”; CllC part tollJoll~~ Iloli~0~ltilIClllcIlt; Cc: Il’cst qcx VCIS 110’ qiw I’on obwrvc iin l&gcr gain tic poids. Iail pcrtc d’O.S~giXlc chl ilSBC/.brutnlc ct bc manifchtc cntrc 2.15 ct ~z95’~.Alors cornincxxx iln palicr lcntcmcnt clkruissant jusquc vcrs G30’. lhtrc 2.+5” ct 3ooq, il y .7 unc pcrtc tl’cnviron 1 iltomc tl’oxyg:bnc par mchSc~~Ic ct Ia pcrtc glol~nlc jusqu’h 700” s’dlhvc Ii 3 atomcs tl’oxygirnc pour 2 rnrdbc~~lcr tic pcrmangiinatc 1-c prodtiit Cinal nolr apib 700” csL;uw~rdnicnt Iln m&langc cl’oxydrn dc mang;in&c ct clc potnssirim. Nous avons obscrv& avcc Ic prisriic tic hei Rcrnmc uric bnnclc trC=s forte pour 897 cm-l ct IIIIC’ Ixinclc fniblc pour 838 cm’*,
Sdfntc
de cc?‘vitcm (IV)
Ix prcduit commcrcinl quc nous iivonb CII cn main5 n’cst pas cl&fin1 mnis so cowportc conimc un m6lnngc tic tdtrirhytlratc et clc scl contcnnnt c’n rnoycnnc 3.1 C-I,0 itnhvtlrc. au Ilcu clc ‘1. Un tcl rndlangc nc conscrvc son quc jusqu’lr ,li”. II SC cl&h~tlratc poicls 1901979 (I;l&‘. 2). Lc procluit J USqU’i irnhydrc n’cst pas stnblc pendant longtcmps CL tK!s 3000, il pcrd Icntcmcnt de l’aullyclriclc _.
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