Impamvu igipimo cy'ubururu bwa metilene gishobora kurenga 100%

Igipimo cy'ubururu bwa metilene cya 101.0% ni igisubizo cy'isesengura cyatangajwe. Ntibivuze ko 100 g y'ibikoresho irimo koko 101 g y'ubururu bwa metilene. Kugira ngo ugisobanukirwe, menya icyapimwe, uburemere bwakoreshejwe nk'umubare ugabanya, n'uko laboratwari yabaze igisubizo.

Ibisobanuro bya USP ku bururu bwa metilene biteganya igipimo kiri hagati ya 97.0% na 103.0%, kibarwa hashingiwe ku buremere nyuma yo kumisha. Iyo ni imipaka yemewe ku kizamini cyagenwe. Ntibivuze ko ubuziranenge nyabwo bushobora kurenga 100%, kandi si intera y'ukudashidikanya ya buri gipimo cya laboratwari.

Tangirira ku mubare ugabanya

Igisubizo gishingiye ku bikoresho uko byakiriwe kireba uko byari bimeze bikigera muri laboratwari, harimo n'amazi yabyo. Igisubizo gishingiye ku buremere nyuma yo kumisha gikura mu mubare ugabanya uburemere bwatakaye mu buryo bwagenwe bwo kumisha. Kigaragaza ingano y'ikinyabutabire gipimwa ugereranyije n'ibikoresho bisigaye.

Aya magambo agomba gukoreshwa witonze. Igice cya USP kivuga ku igabanuka ry'uburemere mu kumisha gisobanura iki gipimo hashingiwe ku bintu bishobora guhinduka imyuka bikavanwamo mu bihe byagenwe. Igabanuka ry'uburemere mu kumisha si buri gihe igipimo cy'amazi gusa. Ibindi bintu bishobora guhinduka imyuka na byo bishobora kurigiramo uruhare. Koresha uburyo bwakoreshejwe n'ishingiro ry'igisubizo byanditse ku cyemezo.

Mu gukosora igipimo mu buryo bworoshye, iyo igipimo cy'ibigize n'igabanuka ry'uburemere mu kumisha bireba ibikoresho bimwe kandi ikinyabutabire gipimwa ntigitakare:

Igipimo gishingiye ku buremere nyuma yo kumisha (%) = igipimo gishingiye ku bikoresho uko byakiriwe (%) × 100 / 100 − igabanuka ry'uburemere mu kumisha (%)

Kubihindura mu cyerekezo kinyuranye:

Igipimo gishingiye ku bikoresho uko byakiriwe (%) = igipimo gishingiye ku buremere nyuma yo kumisha (%) × 100 − igabanuka ry'uburemere mu kumisha (%) / 100

Ntukongere gukosora igisubizo cyamaze gutangazwa gishingiye ku buremere nyuma yo kumisha.

Urugero rw'imibare: icyitegererezo kimwe, ijanisha ebyiri zombi zemewe

Tekereza icyitegererezo cya 100 g kirimo 88 g y'ubururu bwa metilene, ibarwa nka kolorure itarimo amazi, 10 g y'amazi, na 2 g y'ibindi bintu bikomeye bidahinduka imyuka. Dufate ko kumisha bikuramo amazi yose gusa, bidatakaje cyangwa ngo bihindure irangi. Izi ni ingano zo kwigishirizaho, si ibisubizo by'icyiciro runaka cy'ibicuruzwa.

Imigabane ibarwa nyuma yo kumisha yose hamwe ingana na 100%. Kuba igipimo cyazamutse ntibyakuyeho ibindi bintu bikomeye cyangwa ngo byongere ingano y'irangi. Byahinduye gusa ishingiro ry'igereranya: aho gukoresha icyitegererezo cyose uko cyakiriwe, hakoreshejwe igice cyacyo cyumye.

Ku rundi ruhande, raporo igaragaza igipimo cya 99.0% gishingiye ku buremere nyuma yo kumisha n'igabanuka ry'uburemere mu kumisha rya 12.0% yumvikanisha ko igipimo gishingiye ku bikoresho uko byakiriwe ari 99.0 × 0.88 = 87.12%, hakurikijwe ibyo uburyo bwo gupima bufata nk'ukuri. Kugereranya iyo 87.12% mu buryo butaziguye na 99.0% y'undi utanga ibikoresho ibarwa nyuma yo kumisha byaba ari ukugereranya ingano zitandukanye.

Amazi ashobora kandi kuba igice cy'imiterere ya kirisitali irimo amazi. Itandukaniro hagati y'ubururu bwa metilene burimo molekile eshatu z'amazi n'ubururu bwa metilene butarimo amazi risobanura impamvu uburemere bubarwa hakurikijwe ifomula y'ikinyabutabire n'ishingiro ry'igipimo bigomba guhura. Inyandiko ivuga ko ikinyabutabire kirimo amazi muri kirisitali ntisimbura igisubizo cy'igipimo cy'amazi cyangwa cyo kumisha cyihariye kuri buri cyiciro cy'ibikoresho.

Impamvu igipimo cyatangajwe gishobora kurenga 100%

Ibarura rikwiye rishingiye ku buremere bwumye kandi rikoresha ibipimo nyakuri ntirishobora gutuma umugabane nyawo w'uburemere urenga 100%. Igisubizo kirenga uwo mupaka gituruka ku buryo igereranya ry'isesengura ryabonetse, harimo ukudashidikanya mu gupima, ukubogama gushoboka, cyangwa ikibazo mu gutangaza cyangwa kubara igisubizo.

Itangazo ryemewe rya USP ry'ivugurura ryo muri Nzeri 2023 risobanura igipimo kigereranya igisubizo cy'icyitegererezo muri koromatogarafi y'ibisukika n'icy'ikinyabutabire fatizo. Ni igipimo gishingiye ku kugena neza imikorere y'ibikoresho byo gupima, si ugutandukanya no gupima uburemere bwa buri kinyabutabire kiri mu ifu. Agaciro kahawe ikinyabutabire fatizo, gupima uburemere, kuvanga ugabanya ubucucike, igisubizo cy'igikoresho cyo gupima, no gukosora hashingiwe ku kumisha bishobora kugira ingaruka ku gereranya ritangazwa.

Tekereza ikindi cyitegererezo cy'urugero: 90 g y'ubururu bwa metilene na 10 g y'amazi. Umugabane wacyo nyawo nyuma yo kumisha ni 100%. Iyo igisubizo cy'igipimo kirenze agaciro nyako ho 1%, naho gukosora hashingiwe ku kumisha bikaba nyakuri, uburyo bwo gupima bugereranya ko muri 100 g ya mbere harimo ingano ihwanye na 90.9 g. Gukosora iryo gereranya bitanga 90.9 / 90 × 100 = 101.0%. Iyo 0.9 g y'inyongera ni ukugereranya ingano iri hejuru y'iy'ukuri, si ibikoresho byiyongereye.

Ibisobanuro bya NIST ku kudashidikanya mu gupima bitandukanya igereranya ryabonetse mu gupima no kumenya neza ingano nyayo. Laboratwari igomba gusuzuma ukudashidikanya kw'ibipimo byayo. Imipaka ya 97.0% kugeza kuri 103.0% ntigaragaza ko uburyo bwo gupima bufite “ukudashidikanya kwa ±3%.” Nta nubwo igisubizo kiri hejuru cyemeza ko cyatewe n'imihindagurikire itunguranye. Iyo ibisubizo bikomeza kuba hejuru, hakwiye kugenzurwa igenamiterere ry'ibikoresho byo gupima, itegurwa ry'icyitegererezo, ibipimo bikoreshwa mu gukosora, n'ishingiro ry'ibarura.

Incamake y'icyifuzo cya USP cyo mu 2026 ivuga yeruye ko ari icyifuzo gishingiye kuri verisiyo yemewe yo muri Nzeri 2023. Ivugurura ryatanzwe nk'icyifuzo ntirikwiye gufatwa nk'ibisabwa by'ikizamini byatangiye gukurikizwa kubera gusa ko rifite itariki nshya.

Ingano y'irangi n'ubuziranenge bupimwa hakoreshejwe koromatogarafi bisubiza ibindi bibazo

“Ingano y'irangi” igomba kujyana n'uburyo bwo kuyipima n'ishingiro ry'ibarura byasobanuwe. Urugero, ibisabwa bya Sigma-Aldrich kuri M9140 bivuga ko irangi ririmo amazi rikoreshwa mu gusiga ibyitegererezo by'ibinyabuzima rigomba kugira ingano y'irangi nibura ya 82%. Uwo mubare muto ntarengwa si agaciro gapimwe kuri buri cyiciro cy'ibikoresho. Ntugaragaza ko ibindi bisigaye ari imyanda iteje akaga, kandi ntugaragaza ko ibyo bikoresho byujuje ibisabwa bihwanye n'iby'ibikoresho byo mu rwego rwa farumasi.

Mu buryo nk'ubwo, ijanisha ry'ubuso muri koromatogarafi ribarwa hagabanywa ubuso bw'impinga imwe yatahuwe n'igiteranyo cyagenwe cy'ubuso bw'impinga. Ntibivuze ko byanze bikunze hagabanywa uburemere bw'ubururu bwa metilene n'uburemere bw'icyitegererezo cyose. Amabwiriza ya USP yo gutanga amakuru ya koromatogarafi atandukanya kubara ijanisha hashingiwe ku buso bwose bw'impinga no kubara hakoreshejwe ikinyabutabire fatizo cyo hanze, kandi asobanura ibipimo bigereranya ibisubizo by'ibinyabutabire ku gikoresho gitahura, kuko uburemere bungana bushobora gutanga ibisubizo bitandukanye.

Igikoresho gitahura gishobora kudapima amazi, imyunyu itari iy'ibinyabutabire ngenga, cyangwa buri mwanda w'ibinyabutabire ngenga mu bihe byatoranyijwe. Bityo, ibipimo bitandukanye bishobora kubana bitarinze guteranywa ngo bitange neza 100%. Igisubizo cy'imyanda y'ibinyabutabire ngenga, isesengura ry'ibintu by'ibanze bya shimi, n'igabanuka ry'uburemere mu kumisha ni ibipimo byuzuzanya.

Soma igisubizo nk'igice cya raporo

Koresha amabwiriza yo gusoma icyemezo cy'isesengura kugira ngo ubone ikiranga icyiciro cy'ibikoresho, uburyo bwakoreshejwe, ishingiro ry'igisubizo, igisubizo cyapimwe, n'umupaka wemewe. Gumana buri gisubizo n'ibipimo byacyo n'umubare ugabanya wakoreshejwe. Mu kubara ibisukika bitegurwa muri laboratwari, igikoresho cyo kubara ubucucike bwa mole bw'ubururu bwa metilene kigaragaza neza ibyo ibarura rifata nk'ukuri ku miterere y'ibikoresho no ku gipimo cy'ibigize.

Igipimo cya 101% gishobora kuzuza ibisabwa ku gipimo cy'ibigize, mu gihe ikindi kizamini gisabwa cyo kitabyujuje. Igipimo cya 99% ntigishobora kwemeza ko nta binyabuzima biri mu bikoresho, ko imyanda y'ibintu by'ibanze bya shimi iri mu mipaka yemewe, cyangwa ko igicuruzwa cyahawe uburenganzira. Icyo ubururu bwa metilene bwo ku rwego rwa USP busobanura gishingiye ku bisabwa byose bireba ibyo bikoresho. Igereranya ry'ingirakamaro ry'ubuziranenge rireba niba ibikoresho bifite inyandiko zuzuye byujuje ibyo bisabwa, aho gutondeka ababigurisha hashingiwe ku ijanisha rinini kurusha ayandi.