Yiziphi Izihloli ze-Pocket PH?
Abahloli be-pocket pH bangamadivayisi amancane aphathwayo aletha ulwazi kumsebenzisi ngokunemba, kalula nangokuthengeka. Lawa madivayisi aklanyelwe ukusetshenziswa ezimeni ezahlukene futhi azohlola i-alkalinity (pH) kanye ne-acidity yamasampuli ahlukahlukene. Adume kakhulu ekuhloleni amasampula ekhwalithi yamanzi ngoba angena kahle ephaketheni ukuze alandwe futhi asetshenziswe kalula.
Ngezinhlelo zokusebenza eziningi ezihlukene ezikhiqiza izinhlobonhlobo zezinhlobo zamasampuli, kubalulekile ukwazi ukuthi hlobo luni lwesihloli samanzi se-pH esizokhiqiza imiphumela engcono kakhulu yezidingo zakho zokuhlola isampula. Kunezinhlobonhlobo eziningi zabahloli emakethe ezinikeza izinhlobo ezahlukene zobuchwepheshe ukufeza izidingo zomthengi. Kunezinhlobo ezintathu zabahloli bamanzi be-pH ezilungele ukuhlola ikhwalithi yamanzi: isihloli esilahlwayo se-electrode ye-single junction, i-electrode eshintshwayo ye-single junction kanye ne-electrode eshintshwayo ye-double-junction. Ukukhetha imitha ye-pH yamanzi kuzoncika kakhulu kusampula elihlolwayo, izinga lokuhlola kanye nokunemba okudingekayo.
Amanani we-pH
Uhlobo oluvame kakhulu lokuhlolwa kwekhwalithi yamanzi ukuhlolwa kwe-pH. I-pH yamanzi ibonisa ibhalansi phakathi kwama-ion e-hydrogen, ane-acidic, nama-ion hydroxide, ayisisekelo. Ibhalansi ephelele yakho kokubili iku-pH engu-7. Inani le-pH elingu-7 alithathi hlangothi. Njengoba inani lincipha, le nto iba ne-asidi eyengeziwe; njengoba ikhula, i-alkaline eyengeziwe. Amanani asukela ku-0 (i-acidic ngokuphelele, njenge-asidi yebhethri) ukuya ku-14 (i-alkaline ngokugcwele, isibonelo, isicoci se-drain). Amanzi kampompi ngokuvamile aba phakathi kwe-pH 7, kuyilapho amanzi emvelo evamise ukuba phakathi kwamayunithi angu-6 kuya kwangu-8 e-pH. Izicelo ezidinga ukukala amazinga e-pH zitholakala cishe kuyo yonke imboni nemizi. Uhlelo lokusebenza lwasendlini, olufana nokulinganisa amazinga e-pH e-aquarium yezinhlanzi, luhlukile ekulinganiseni izinga le-pH lamanzi endaweni yokuhlanza amanzi.
Ngaphambi kokukhetha i-pocket tester, kubalulekile ukwazi okwengeziwe nge-electrode. Ingxenye yesihloli sephaketheni esicwiliswa kusampula ukuze kuthathwe isilinganiso se-pH. Ngaphakathi kwe-electrode kukhona i-electrolyte (uketshezi noma ijeli). I-electrode junction iyiphuzu elinezimbotshana phakathi kwe-electrolyte ku-electrode nesampula yakho. Ngokuyisisekelo, i-electrolyte kufanele iphumele kusampula ukuze i-electrode isebenze ukuthola imiphumela enembile. Zonke lezi zingxenye ezincane zisebenza ndawonye ngaphakathi kwe-electrode ukuze zilinganise ngokunembile i-pH.
I-electrode iyancipha kancane kancane ngoba i-electrolyte isetshenziswa ngokuqhubekayo lapho kuthathwa izilinganiso futhi iba nobuthi ngama-ion angcolisayo noma izinhlanganisela. Ama-ion afaka ubuthi ku-electrolyte yizinsimbi, ama-phosphates, ama-sulfate, ama-nitrate namaprotheni. Lapho imvelo i-caustic, kuba mkhulu umthelela ku-electrode. Izindawo ze-Caustic ezinamazinga aphezulu ama-ion angcolisayo, njengezindawo zokuhlanza amanzi angcolile, zingasheshisa ubuthi be-electrolyte. Le nqubo ingenzeka ngokushesha ngabahloli bezinga lokungena abashibhile. Emasontweni ambalwa, amamitha angavilapha futhi aguge. Imitha yekhwalithi ye-pH ephaketheni izofakelwa i-electrode ethembekile enikeza ukufundwa okuzinzile nokunembile ngokungaguquki. Ukugcina i-electrode ihlanzekile futhi inomswakama nakho kubalulekile ekusebenzeni komhloli wephaketheni nokuphila isikhathi eside.
I-Single-Junction Disposable pH Testers
Kumsebenzisi wezikhathi ezithile wabahloli be-pH onesidingo se-pH yesampula evamile yamanzi, ubuchwepheshe obulula obusebenzisa i-electrode ye-single junction buzonikeza amandla amaningi nokunemba. I-electrode ye-single junction inesikhathi sempilo esifushane kune-electrode ephindwe kabili futhi ivamise ukusetshenziselwa indawo yezikhathi ezithile i-pH nokuhlola izinga lokushisa. Inzwa ye-single junction engashintsheki inokunemba okungu-+0.1 pH. Lena inketho yokonga futhi ngokuvamile ithengwa umsebenzisi wokugcina wobuchwepheshe obuncane. Uma umhloli engasanikezi ukufundwa okunembile, vele ukulahle futhi uthenge esinye isihloli sephakethe. Izihloli ezilahlwayo ze-single-junction ngokuvamile zisetshenziswa kuma-hydroponics, e-aquaculture, emanzini aphuzwayo, ezindaweni ezihlala emanzini, echibini nasezindaweni zokungcebeleka, ezemfundo, nasezimakethe zezingadi.
I-Single-Junction Replaceable Electrode pH Testers
Isinyathelo esikhuphukayo ukusuka kusihloli esilahlwayo se-junction eyodwa isihloli sephakethe se-junction eyodwa, esingafinyelela ukunemba okungcono kuka-+0.01 pH. Lo mhloli ufanelekele iningi le-ASTM Intl. kanye nezinqubo zokuhlola ze-US EPA. Inzwa iyashintshwa, igcina iyunithi, ngakho ingasetshenziswa ngokuphindaphindiwe. Ukushintsha inzwa kuyinketho yomsebenzisi ovamile osebenzisa umhloli njalo. Uma iyunithi isetshenziswa njalo futhi amasampula anenqwaba yama-ion afaka ushevu ku-electrolyte ku-electrode, kungase kube usizo kakhulu ukuya ezingeni elilandelayo labahloli ngobuchwepheshe be-electrode ehlanganisa kabili.
I-Double-Junction Replaceable Electrode pH Testers
Ubuchwepheshe be-double junction buhlinzeka ngendlela ende yokufuduka ukuze ukungcola kuhambe, kubambezeleka umonakalo olimaza i-pH electrode, kuthuthukise futhi kunwebe impilo yeyunithi. Ngaphambi kokuthi ukungcola kufinyelele ku-electrode, akumele kusabalale ngokuhlangana okukodwa, kodwa kuhlangane ezimbili. Abahloli be-double junction bangabahloli abasindayo, bekhwalithi ephezulu abamelana nezimo ezimbi kakhulu namasampuli. Angasetshenziswa namanzi angcolile, izixazululo eziqukethe ama-sulfide, izinsimbi ezisindayo kanye namabhafa e-Tris. Kumakhasimende adinga ukuphinda ukuhlolwa kwawo kwe-pH ngokuqhubekayo, eveza izinzwa ezintweni ezinolaka kakhulu, kubalulekile ukusebenzisa isihloli esihlanganisa izinto ezimbili ukuze kunwetshwe impilo ye-electrode nokuqinisekisa nokunemba, futhi. Ngokusetshenziswa ngakunye, ukufundwa kuzokhukhuleka futhi kungathembeki kancane. Idizayini ye-double junction iqinisekisa ikhwalithi ephezulu kakhulu futhi ubuchwepheshe busetshenziselwa ukukala amazinga e-pH ngokunemba okuphelele okungu-+0.01 pH.
Ukulinganisa kubalulekile ukuze kube nokunemba. Akuvamile ukuthi imitha ye-pH ikhukhuleke ukusuka kuzilungiselelo zayo ezilinganisiwe. Uma sekwenzekile, imiphumela engalungile ingase ibe khona. Kubalulekile ukulinganisa abahloli ukuthola izilinganiso ezinembile. Amanye amamitha ephakethe we-pH anokubonwa kwebhafa okuzenzakalelayo, okwenza ukulinganisa kube lula futhi kusheshe. Amamodeli amaningi ashibhile adinga ukulinganiswa okuvamile ukuze kuqinisekiswe izilinganiso ezinembile. Ukulinganisa kwabahloli be-pH kufanele kwenziwe njalo, kunconywe nsuku zonke noma okungenani kanye ngesonto. Linganisa kufikela kumaphoyinti amathathu usebenzisa i-US noma i-National Institute of Standards and Technology isethi yamazinga.
Abahloli bephaketheni bebethrenda ekuhlolweni kwamanzi eminyakeni embalwa edlule, njengoba behlangene, bayaphatheka, banembile futhi bangakhiqiza ukufundwa ngendaba yamasekhondi ngokucindezela inkinobho. Njengoba imakethe yabahloli iqhubeka nokufuna ukuziphendukela kwemvelo, abakhiqizi bengeze izici ezifana nezindlu ezingenamanzi nezingangeni uthuli ukuze kuvikelwe abahloli ezindaweni ezimanzi kanye nokungaphathwa kahle. Ngaphezu kwalokho, izibonisi ezinkulu, ze-ergonomic zenza ukufunda kube lula. Isinxephezelo sezinga lokushisa esizenzakalelayo, isici ngokuvamile ebekelwe amamitha aphathwayo kanye ne-benchtop, naso sengezwe kumamodeli akamuva. Amanye amamodeli ayakwazi ngisho nokulinganisa nokubonisa izinga lokushisa langempela. Abahloli abathuthukisiwe bazofaka ukuqina, ukulinganisa nezinkomba zebhethri kusibonisi nokuzicisha ukuze kongiwe ukuphila kwebhethri. Ukukhetha i-pocket tester efanele yohlelo lwakho lokusebenza kuzokunikeza ukusetshenziswa okuthembekile nokunembile njalo.
Futhi singahlinzeka ngezinzwa zekhwalithi yamanzi ezikala amanye amapharamitha ahlukene ukuze uthole ireferensi yakho
Isikhathi sokuthumela: Nov-12-2024