Kedu uru na ọghọm dị na usoro reflux titration na usoro ngwa ngwa maka mkpebi COD?

Nnwale ịdị mma mmiriNnwale CODụkpụrụ:
GB11914-89 "Mkpebi nke ikuku oxygen chọrọ na ogo mmiri site na usoro dichromate"
HJ/T399-2007 "Ọdịmma mmiri - Mkpebi nke Ọchịchọ Oxygen Oxygen - Spectrophotometry mgbaze ngwa ngwa"
TS EN ISO 6060 Mkpebi nke ikuku oxygen chọrọ nke ịdị mma mmiri
Mkpebi nke mmiri oxygen chọrọ site na usoro dichromate:
Nọmba ọkọlọtọ: “GB/T11914-89″
Usoro potassium dichromate na-eji arụ ọrụ pretreatment nke n'ụzọ zuru ezu oxidizing ihe nlele mmiri na ngwọta acid siri ike na reflux ya maka awa 2, nke mere na ọtụtụ n'ime ihe ndị dị ndụ * n'ime ihe nlele mmiri na-agbaze.
Atụmatụ: Ọ nwere uru nke obosara nha nso (5-700mg / L), ezi reproducibility, ike nnyonye anya mwepụ, elu ziri ezi na nkenke, ma n'otu oge ahụ ọ nwere ogologo mgbaze oge na nnukwu nke abụọ mmetọ, na ọ kwesịrị ịbụ. tụrụ na nnukwu batches nke sample. Ịrụ ọrụ dị ala ma nwee ụfọdụ njedebe.
adịghị ike:
1. Ọ na-ewe oge dị ukwuu, na nke ọ bụla sample kwesịrị ka reflux maka 2 awa;
2. The reflow akụrụngwa na-enwe nnukwu ohere na-eme ka ogbe nleta siri ike;
3. Ọnụ nke nyocha dị oke elu;
4. N'oge usoro nha, mkpofu nke mmiri nloghachi dị ịtụnanya;
5. Nri mercury nnu nwere ike ịkpata mmetọ nke abụọ n'ụzọ dị mfe;
6. Ọnụ ọgụgụ nke reagents buru ibu na ọnụ ahịa ihe oriri dị elu;
7. Usoro ule dị mgbagwoju anya na ọ bụghị maka nkwalite
Ogo mmiri Mkpebi nke ikuku oxygen na-achọ ngwa ngwa mgbaze spectrophotometry:
Nọmba ọkọlọtọ: HJ/T399-2007
A na-eji usoro mkpebi ngwa ngwa COD eme ihe na nlebanya mberede nke isi mmalite mmetọ yana mkpebi siri ike nke ihe nlele mmiri mkpofu. The isi pụtara ìhè uru nke usoro a bụ na ọ na-eji obere sample reagents, na-azọpụta ike, na-azọpụta oge, dị mfe na ngwa ngwa, na-eme ka elu maka adịghị ike nke kpochapụwo analysis ụzọ. Ụkpụrụ bụ: na acid acid siri ike, na ọnụnọ nke ihe mgbagwoju anya, a na-agbaze mmiri mmiri na okpomọkụ nke 165 Celsius C maka nkeji 10. Ihe ndị na-ebelata ihe dị n'ime mmiri bụ potassium dichromate na-agbaze, na ion chromium hexavalent na-ebelata ka ọ bụrụ ion chromium trivalent. Ọchịchọ oxygen oxygen dị na mmiri dabara na ntinye nke Cr3+ mepụtara site na mbelata. Mgbe uru COD dị na nlele ahụ bụ 100-1000mg / L, tụọ nnabata nke chromium trivalent nke a na-emepụta site na mbelata potassium dichromate na ogologo ogologo nke 600nm± 20nm; Mgbe uru COD bụ 15-250mg/L, tụọ mkpokọta nnabata nke ion chromium abụọ nke chromium hexavalent na-ebelata ma belata trivalent chromium nke potassium dichromate mepụtara na ogologo ogologo nke 440nm± 20nm. Usoro a na-eji o Potassium hydrogen phthalate na-adọta ọkọlọtọ ọkọlọtọ. Dị ka iwu Beer si kwuo, n'ime ụfọdụ ntinye uche, ntinye nke ngwọta nwere njikọ eriri na uru COD nke ihe nlele mmiri. Dị ka nnabata ahụ si dị, a na-eji usoro nhazigharị iji gbanwee ya ka ọ bụrụ ikuku oxygen na-achọ nke mmiri a tụrụ atụ.
Atụmatụ: Usoro a nwere uru nke ọrụ dị mfe, nchekwa, nkwụsi ike, izi ezi na ntụkwasị obi; ọ nwere ngwa ngwa nyocha ngwa ngwa ma dị mma maka mkpebi siri ike; ọ na-ewe obere ohere, na-eri obere ume, na-eji obere reagents eme ihe, na-ebelata mmiri mmiri n'efu, ma na-ebelata ihe mkpofu nke abụọ. Secondary mmetọ, wdg, ọ na-ọtụtụ-eji kwa ụbọchị na mberede nlekota oru, na-eme ka maka adịghị ike nke kpochapụwo ọkọlọtọ usoro, na ike dochie ochie ọkụ ọkụ eletrik kpo oku mba ọkọlọtọ reflow usoro.