Kodi Pocket PH Testers ndi chiyani?
Zipangizo zoyesera pH ya pocket ndi zipangizo zazing'ono zonyamulika zomwe zimapereka chidziwitso kwa wogwiritsa ntchito molondola, mosavuta komanso motsika mtengo. Zipangizozi zapangidwa kuti zigwiritsidwe ntchito m'mikhalidwe yosiyanasiyana ndipo zimayesa alkalinity (pH) ndi acidity ya zitsanzo zosiyanasiyana. Makamaka ndizodziwika poyesa zitsanzo zabwino zamadzi chifukwa zimalowa bwino m'thumba kuti zikhale zosavuta kuzipeza ndikugwiritsa ntchito.
Ndi mitundu yosiyanasiyana ya magwiritsidwe ntchito omwe amapanga mitundu yosiyanasiyana ya zitsanzo, ndikofunikira kudziwa mtundu wa choyezera madzi cha pH chomwe chingapereke zotsatira zabwino kwambiri pazosowa zanu zoyesera zitsanzo. Pali mitundu yosiyanasiyana ya zoyezera pamsika zomwe zimapereka mitundu yosiyanasiyana ya ukadaulo kuti zikwaniritse zosowa za ogula. Pali mitundu itatu ya zoyezera madzi za pH zomwe ndi zabwino poyesa ubwino wa madzi: choyezera madzi cha single-junction electrode disposable, single-junction replaceable electrode and double-junction replaceable electrode. Kusankha pH meter ya madzi kudzadalira kwambiri chitsanzo chomwe chikuyesedwa, cadence ya mayeso ndi kulondola kofunikira.
Makhalidwe a pH
Mtundu wodziwika bwino wa mayeso a khalidwe la madzi ndi mayeso a pH. pH ya madzi imasonyeza kufanana pakati pa ma ayoni a hydrogen, omwe ndi acidic, ndi ma ayoni a hydroxide, omwe ndi oyambira. Kulinganiza bwino kwa awiriwa kuli pa pH ya 7. pH ya 7 ndi yopanda mbali. Pamene chiwerengerocho chikuchepa, chinthucho chimakhala ndi acidic yambiri; pamene chikuwonjezeka, chimakhala ndi alkaline yambiri. Mitengo imayambira pa 0 (yokhala ndi acidic yonse, monga batri acid) mpaka 14 (yokhala ndi alkaline yonse, mwachitsanzo, chotsukira zimbudzi). Madzi apampopi nthawi zambiri amakhala pafupifupi pH 7, pomwe madzi achilengedwe nthawi zambiri amakhala pakati pa mayunitsi 6 mpaka 8 a pH. Kugwiritsa ntchito komwe kumafunika kuyeza kuchuluka kwa pH kumapezeka pafupifupi m'mafakitale ndi m'nyumba iliyonse. Kugwiritsa ntchito kunyumba, monga kuyeza kuchuluka kwa pH ya nsomba za m'madzi, kumasiyana ndi kuyeza kuchuluka kwa pH ya madzi mu chomera chotsukira madzi.
Musanasankhe choyesera thumba, ndikofunikira kudziwa zambiri za electrode. Ndi gawo la choyesera thumba lomwe limaviikidwa mu chitsanzo kuti liyese pH. Mkati mwa electrode muli electrolyte (madzimadzi kapena gel). Malo olumikizirana a electrode ndi malo obowola pakati pa electrolyte mu electrode ndi chitsanzo chanu. Mwachidule, electrolyte iyenera kutuluka mu chitsanzo kuti electrode igwire ntchito kuti ipeze zotsatira zolondola. Zigawo zonse zazing'onozi zimagwirira ntchito limodzi mkati mwa electrode kuti ziyeze pH molondola.
Elekitirodi imawonongeka pang'onopang'ono chifukwa electrolyte imagwiritsidwa ntchito nthawi zonse poyesa ndipo imaipitsidwa ndi ma ayoni kapena zinthu zina zodetsa. Ma ayoni omwe amapha electrolyte ndi zitsulo, ma phosphates, ma sulfates, ma nitrates ndi mapuloteni. Malo oyaka kwambiri, amakhudzidwa kwambiri ndi elekitirodi. Malo oyaka kwambiri okhala ndi ma ayoni ambiri odetsa, monga malo oyeretsera madzi akuda, amatha kufulumizitsa poizoni wa elekitirodi. Izi zitha kuchitika mwachangu ndi oyesa otsika mtengo oyambira. Pakatha milungu ingapo, ma mita amatha kukhala ochedwa komanso osasinthasintha. Choyezera pH chapamwamba cha pocket chidzakhala ndi elekitirodi yodalirika yomwe imapereka kuwerenga kokhazikika komanso kolondola nthawi zonse. Kusunga elekitirodi kukhala yoyera komanso yonyowa ndikofunikira kwambiri kuti woyesa m'pocket agwire ntchito bwino komanso kuti akhale ndi moyo wautali.
Oyesa pH Osagwiritsidwa Ntchito Pamodzi
Kwa ogwiritsa ntchito nthawi zina oyesa pH omwe ali ndi pH yofanana ndi ya madzi, ukadaulo wosavuta wogwiritsa ntchito electrode imodzi yolumikizana umapereka mphamvu zambiri komanso kulondola. Electrode imodzi yolumikizana imakhala ndi moyo waufupi kuposa electrode iwiri yolumikizana ndipo nthawi zambiri imagwiritsidwa ntchito poyesa pH ndi kutentha nthawi zina. Sensor imodzi yolumikizana yomwe singasinthidwe imakhala ndi kulondola kwa pH +0.1. Iyi ndi njira yotsika mtengo ndipo nthawi zambiri imagulidwa ndi ogwiritsa ntchito ochepa. Woyesa akasiya kupereka ziwerengero zolondola, ingotayani ndikugula china choyesera cham'thumba. Oyesa otayika a single-junction nthawi zambiri amagwiritsidwa ntchito mu hydroponics, aquaculture, madzi akumwa, aquariums, dziwe losambira ndi malo osambira, maphunziro, ndi misika ya minda.
Oyesa pH a Electrode Omwe Amasinthidwa ndi Chimodzi
Chinthu china chokwera kuchokera ku choyezera chosakanikirana ndi chimodzi ndi choyezera chosinthika cha pocket chosakanikirana ndi chimodzi, chomwe chingapangitse kulondola kwa +0.01 pH. Choyezera ichi ndi choyenera pa njira zambiri zoyesera za ASTM Intl. ndi US EPA. Choyezerachi chimatha kusinthidwa, kusunga chipangizocho, kotero chingagwiritsidwe ntchito mobwerezabwereza. Kusintha choyezera ndi njira yabwino kwa ogwiritsa ntchito wamba omwe amagwiritsa ntchito choyezera nthawi zonse. Pamene chipangizocho chikugwiritsidwa ntchito nthawi zonse ndipo zitsanzozo zili ndi ma ion ambiri omwe amawononga electrolyte mu electrode, zingakhale bwino kusamukira ku gawo lotsatira la oyesa ndi ukadaulo wa ma electrode olumikizana kawiri.
Oyesa pH a Electrode Osinthika Awiri
Ukadaulo wa kulumikizana kawiri umapereka njira yayitali yosunthira zinthu zodetsa, zomwe zimachedwetsa kuwonongeka komwe kumawononga electrode ya pH, ndikuwonjezera ndi kukulitsa moyo wa chipangizocho. Kuipitsidwa kusanafike ku electrode, kuyenera kufalikira osati kudzera mu mgwirizano umodzi, koma kudzera mu mgwirizano ziwiri. Oyesa kulumikizana kawiri ndi oyesa olemera, apamwamba kwambiri omwe amatha kupirira nyengo zovuta kwambiri komanso zitsanzo. Angagwiritsidwe ntchito ndi madzi otayira, mayankho okhala ndi sulfides, zitsulo zolemera ndi Tris buffers. Kwa makasitomala omwe amafunika kubwereza mayeso awo a pH mobwerezabwereza, kuwonetsa masensa kuzinthu zamphamvu kwambiri, ndikofunikira kugwiritsa ntchito choyesa kulumikizana kawiri kuti chiwonjezere moyo wa electrode ndikuwonetsetsa kuti kulondola kwake kuli kolondola. Pakugwiritsa ntchito kulikonse, kuwerenga kudzayenda pang'onopang'ono ndipo sikudzakhala kodalirika. Kapangidwe ka kulumikizana kawiri kamatsimikizira kuti khalidwe lapamwamba kwambiri ndipo ukadaulo umagwiritsidwa ntchito poyesa kuchuluka kwa pH pamlingo woyenera wa +0.01 pH.
Kulinganiza ndikofunikira kuti pakhale kulondola. Sizachilendo kuti pH meter isunthe kuchoka pamalo ake olinganiza. Ikatero, zotsatira zosalondola zimatha kuchitika. Ndikofunikira kulinganiza oyesa kuti mupeze miyeso yolondola. Ma pH pocket meter ena ali ndi kuzindikira kwa buffer yokha, zomwe zimapangitsa kuti kulinganiza kukhale kosavuta komanso mwachangu. Ma model ambiri otsika mtengo amafunika kulinganiza pafupipafupi kuti atsimikizire miyeso yolondola. Kulinganiza kwa oyesa pH kuyenera kuchitika nthawi zonse, komwe kumalimbikitsidwa tsiku lililonse kapena kamodzi pa sabata. Kulinganiza mpaka mfundo zitatu pogwiritsa ntchito miyezo ya US kapena National Institute of Standards and Technology buffer.
Oyesa matumba akhala akutchuka kwambiri pa mayeso amadzi m'zaka zingapo zapitazi, chifukwa ndi ang'onoang'ono, onyamulika, olondola ndipo amatha kuwerengera mumphindi zochepa chabe akangodina batani. Pamene msika wa oyesa ukupitilira kufuna kusintha, opanga awonjezera zinthu monga nyumba zosalowa madzi komanso zosapsa fumbi kuti ateteze oyesa ku malo onyowa komanso kusagwiritsidwa ntchito bwino. Kuphatikiza apo, zowonetsera zazikulu, zokhazikika zimapangitsa kuwerenga kukhala kosavuta. Kulipira kutentha kokha, komwe nthawi zambiri kumasungidwa pa mita yonyamulidwa m'manja ndi pa benchtop, nakonso kwawonjezeredwa ku mitundu yaposachedwa. Mitundu ina imatha kuyeza ndikuwonetsa kutentha kwenikweni. Oyesa apamwamba amakhala ndi zizindikiro zokhazikika, zowerengera ndi batri pachiwonetsero ndikuzimitsa yokha kuti batri lizimitsidwe. Kusankha choyesa matumba choyenera pa pulogalamu yanu kudzakupatsani kugwiritsa ntchito kodalirika komanso kolondola nthawi zonse.
Tikhozanso kupereka masensa a khalidwe la madzi omwe amayesa magawo ena osiyanasiyana kuti muwagwiritse ntchito.
Nthawi yotumizira: Novembala-12-2024