{"id":1709,"date":"2022-08-31T08:38:17","date_gmt":"2022-08-31T08:38:17","guid":{"rendered":"https:\/\/tegent.com.vn\/consumable\/test-kit-do-chi-tieu-cod\/"},"modified":"2023-10-13T04:09:12","modified_gmt":"2023-10-13T04:09:12","slug":"xac-dinh-cod-trong-nuoc-chemetrics-en","status":"publish","type":"mona_consumable","link":"https:\/\/tegent.com.vn\/en\/consumable\/xac-dinh-cod-trong-nuoc-chemetrics-en\/","title":{"rendered":"X\u00c1C \u0110\u1ecaNH COD TRONG N\u01af\u1edaC – CHEMETRICS USA"},"content":{"rendered":"
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X\u00c1C \u0110\u1ecaNH COD TRONG N\u01af\u1edaC – CHEMETRICS USA<\/h2>\n<\/div>\n<\/div>\n
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Test kit \u0111o ch\u1ec9 ti\u00eau COD (ch\u1ec9 s\u1ed1 nhu c\u1ea7u oxy h\u00f3a h\u1ecdc – Chemical Oxygen Demand) c\u1ee7a CHEMetrics (M\u1ef9) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 \u00f4 nhi\u1ec5m h\u1eefu c\u01a1 trong n\u01b0\u1edbc th\u1ea3i. \u0110\u00e2y l\u00e0 l\u01b0\u1ee3ng oxy c\u1ea7n thi\u1ebft \u0111\u1ec3 oxy ho\u00e1 c\u00e1c h\u1ee3p ch\u1ea5t ho\u00e1 h\u1ecdc trong n\u01b0\u1edbc bao g\u1ed3m c\u1ea3 v\u00f4 c\u01a1 v\u00e0 h\u1eefu c\u01a1.<\/p>\n

Trong c\u00f4ng nghi\u1ec7p, nh\u1ea5t l\u00e0 ng\u00e0nh x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i, COD \u0111\u01b0\u1ee3c \u0111o theo th\u1eddi gian th\u1ef1c, gi\u00fap c\u1ea3i thi\u1ec7n qu\u00e1 tr\u00ecnh x\u1eed l\u00fd n\u01b0\u1edbc. COD cho bi\u1ebft h\u00e0m l\u01b0\u1ee3ng ch\u1ea5t h\u1eefu c\u01a1 c\u00f3 trong n\u01b0\u1edbc. \u0110\u00e2y ch\u00ednh l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n quan tr\u1ecdng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 \u00f4 nhi\u1ec5m n\u01b0\u1edbc t\u1ea1i ngu\u1ed3n.<\/p>\n

Nhu c\u1ea7u oxy h\u00f3a h\u1ecdc (COD) l\u00e0 g\u00ec?<\/h3>\n

Nhu c\u1ea7u oxy h\u00f3a h\u1ecdc (COD) l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 n\u01b0\u1edbc th\u1ea3i \u0111o l\u01b0\u1ee3ng ch\u1ea5t oxy h\u00f3a c\u1ee5 th\u1ec3 sau khi n\u00f3 ph\u1ea3n \u1ee9ng v\u1edbi ch\u1ea5t h\u1eefu c\u01a1 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t. X\u00e9t nghi\u1ec7m COD th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn vi\u1ec7c ph\u00e2n h\u1ee7y m\u1eabu n\u01b0\u1edbc trong l\u1ecd k\u00edn b\u1eb1ng kali dicromat v\u00e0 axit sunfuric \u1edf 150oC trong 2 gi\u1edd.<\/p>\n

\"COD

COD Chemetrcis<\/p><\/div>\n

T\u1ea1i sao ph\u1ea3i ki\u1ec3m tra COD?<\/h3>\n

C\u00e1c ph\u00e9p \u0111o nhu c\u1ea7u oxy h\u00f3a h\u1ecdc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u01b0\u1edbc t\u00ednh m\u1ee9c \u0111\u1ed9 \u00f4 nhi\u1ec5m n\u01b0\u1edbc v\u00e0o v\u00e0 ra kh\u1ecfi c\u00e1c c\u01a1 s\u1edf x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i v\u00e0 c\u00f4ng nghi\u1ec7p. T\u1ea1i Hoa K\u1ef3, c\u00e1c c\u01a1 s\u1edf x\u1eed l\u00fd \u0111\u01b0\u1ee3c coi l\u00e0 ngu\u1ed3n \u0111i\u1ec3m, khi\u1ebfn ch\u00fang \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd theo \u0110\u1ea1o lu\u1eadt N\u01b0\u1edbc s\u1ea1ch (CWA), t\u1eeb \u0111\u00f3 \u0111\u1eb7t ra c\u00e1c m\u1ee5c ti\u00eau th\u1ea3i ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m c\u1ee5 th\u1ec3 c\u1ee7a c\u01a1 s\u1edf nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a quy tr\u00ecnh cho ph\u00e9p H\u1ec7 th\u1ed1ng Lo\u1ea1i b\u1ecf Ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m Qu\u1ed1c gia (NPDES). C\u00e1c gi\u1ea5y ph\u00e9p n\u00e0y th\u01b0\u1eddng quy \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch h\u00f3a h\u1ecdc COD.<\/p>\n

Ngo\u00e0i ra, c\u00f3 m\u1ed9t m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa vi\u1ec7c s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng t\u1ea1i c\u00e1c c\u01a1 s\u1edf x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i v\u00e0 COD. C\u00e1c k\u1ef9 s\u01b0 x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng COD l\u00e0m ch\u1ec9 s\u1ed1 cho l\u01b0\u1ee3ng oxy c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c d\u00f2ng ch\u1ea5t th\u1ea3i \u0111\u1ea7u v\u00e0o. \u0110i\u1ec1u n\u00e0y c\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb s\u1ee5c kh\u00ed. Hi\u1ec3u bi\u1ebft v\u1ec1 xu h\u01b0\u1edbng COD cho ph\u00e9p c\u00e1c k\u1ef9 s\u01b0 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng v\u00e0 gi\u00e0nh quy\u1ec1n ki\u1ec3m so\u00e1t chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

Gi\u1edbi thi\u1ec7u v\u1ec1 test COD Chemetrics<\/strong><\/h3>\n

CHEMetrics cung c\u1ea5p hai ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n h\u1ee7y b\u1eb1ng l\u00f2 ph\u1ea3n \u1ee9ng dicromat \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhanh ch\u00f3ng, d\u1ec5 d\u00e0ng, an to\u00e0n c\u00e1c m\u1ee9c COD th\u1ea5p, trung b\u00ecnh v\u00e0 cao trong n\u01b0\u1edbc th\u1ea3i: Ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c USEPA ch\u1ea5p nh\u1eadn* v\u00e0 ph\u01b0\u01a1ng ph\u00e1p kh\u00f4ng ch\u1ee9a th\u1ee7y ng\u00e2n. C\u00e1c s\u1ea3n ph\u1ea9m s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c USEPA ch\u1ea5p nh\u1eadn c\u00f3 ch\u1ee9a th\u1ee7y ng\u00e2n sunfat trong thu\u1ed1c th\u1eed \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c t\u00e1c nh\u00e2n c\u1ea3n tr\u1edf clorua. D\u00f2ng s\u1ea3n ph\u1ea9m kh\u00f4ng ch\u1ee9a th\u1ee7y ng\u00e2n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng khi nhi\u1ec5u clorua kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng lo ng\u1ea1i v\u00e0 kh\u00f4ng c\u1ea7n b\u00e1o c\u00e1o USEPA.<\/p>\n

Nh\u1ea5p v\u00e0o s\u1ed1 danh m\u1ee5c trong c\u00e1c b\u1ea3ng b\u00ean d\u01b0\u1edbi \u0111\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin ho\u1eb7c mua b\u1ed9 x\u00e9t nghi\u1ec7m COD.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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CHEMetrics cung c\u1ea5p 02 ph\u01b0\u01a1ng ph\u00e1p ph\u00e1 m\u1eabu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c m\u1ee9c COD th\u1ea5p, trung b\u00ecnh v\u00e0 cao trong n\u01b0\u1edbc th\u1ea3i: Ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c USEPA ch\u1ea5p nh\u1eadn v\u00e0 ph\u01b0\u01a1ng ph\u00e1p kh\u00f4ng ch\u1ee9a th\u1ee7y ng\u00e2n. C\u00e1c s\u1ea3n ph\u1ea9m s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c USEPA ch\u1ea5p nh\u1eadn c\u00f3 ch\u1ee9a sulfat th\u1ee7y ng\u00e2n trong thu\u1ed1c th\u1eed \u0111\u1ec3 lo\u1ea1i b\u1ecf nhi\u1ec5u chloride. D\u00f2ng s\u1ea3n ph\u1ea9m kh\u00f4ng ch\u1ee9a th\u1ee7y ng\u00e2n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng khi s\u1ef1 x\u00e2m nh\u1eadm chloride kh\u00f4ng \u0111\u00e1ng lo ng\u1ea1i.<\/p>\n

C\u00e1c vial thu\u1ed1c th\u1eed c\u1ee7a CHEMetrics ch\u1ee9a dung d\u1ecbch axit sunfuric v\u00e0 kali dicromate. \u0110\u1ec3 ti\u1ebfn h\u00e0nh x\u00e1c \u0111\u1ecbnh COD, ng\u01b0\u1eddi s\u1eed d\u1ee5ng ch\u1ec9 c\u1ea7n th\u00e1o n\u1eafp v\u1eb7n teflon ra kh\u1ecfi vial, n\u1ea1p m\u1eabu v\u00e0 thay th\u1ebf n\u1eafp \u0111\u1eady. Sau \u0111\u00f3, vial \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng trong hai gi\u1edd \u1edf 150\u00b0C b\u1eb1ng kh\u1ed1i ph\u00e1 m\u1eabu chu\u1ea9n. Khi ph\u00e1 m\u1eabu ho\u00e0n t\u1ea5t, k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 lo\u1ea1i quang k\u1ebf n\u00e0o c\u00f3 kh\u1ea3 n\u0103ng ch\u1ea5p nh\u1eadn c\u00e1c t\u1ebf b\u00e0o \u0111\u01b0\u1eddng k\u00ednh 16 mm. C\u00e1c vial COD CHEMetrics c\u00f3 th\u1ec3 \u0111o tr\u1ef1c ti\u1ebfp trong m\u00e1y quang k\u1ebf \u0111a ph\u00e2n t\u00edch V-2000 c\u1ee7a CHEMetrics ho\u1eb7c c\u00e1c lo\u1ea1i m\u00e1y \u0111o quang ph\u1ed5 kh\u00e1c.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Range<\/th>\nMethod<\/th>\nKit Catalog No.<\/th>\nNo. of Vials<\/th>\n<\/tr>\n
0-150 ppm (LR) USEPA-accepted<\/td>\nDichromate Reactor Digestion<\/td>\nK-7350S*<\/a><\/td>\n25<\/td>\n<\/tr>\n
0-150 ppm (LR) USEPA-accepted<\/td>\nDichromate Reactor Digestion<\/td>\nK-7355*<\/a><\/td>\n150<\/td>\n<\/tr>\n
0-150 ppm (LR) Mercury-free<\/td>\nDichromate Reactor Digestion<\/td>\nK-7351S<\/a><\/td>\n25<\/td>\n<\/tr>\n
0-150 ppm (LR) Mercury-free<\/td>\nDichromate Reactor Digestion<\/td>\nK-7356<\/a><\/td>\n150<\/td>\n<\/tr>\n
0-1500 ppm (HR) USEPA-accepted<\/td>\nDichromate Reactor Digestion<\/td>\nK-7360S*<\/a><\/td>\n25<\/td>\n<\/tr>\n
0-1500 ppm (HR) USEPA-accepted<\/td>\nDichromate Reactor Digestion<\/td>\nK-7365*<\/a><\/td>\n150<\/td>\n<\/tr>\n
0-1500 ppm (HR) Mercury-free<\/td>\nDichromate Reactor Digestion<\/td>\nK-7361S<\/a><\/td>\n25<\/td>\n<\/tr>\n
0-1500 ppm (HR) Mercury-free<\/td>\nDichromate Reactor Digestion<\/td>\nK-7366<\/a><\/td>\n150<\/td>\n<\/tr>\n
0-15,000 ppm (HR+) Not USEPA Approved<\/td>\nDichromate Reactor Digestion<\/td>\nK-7370S*<\/a><\/td>\n25<\/td>\n<\/tr>\n
0-15,000 ppm (HR+) Not USEPA Approved<\/td>\nDichromate Reactor Digestion<\/td>\nK-7375*<\/a><\/td>\n98<\/td>\n<\/tr>\n
0-15,000 ppm (HR+) Mercury-free<\/td>\nDichromate Reactor Digestion<\/td>\nK-7371S<\/a><\/td>\n25<\/td>\n<\/tr>\n
0-15,000 ppm (HR+) Mercury-free<\/td>\nDichromate Reactor Digestion<\/td>\nK-7376<\/a><\/td>\n98<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

CHU\u1ea8N PH\u00c2N T\u00cdCH<\/strong><\/h2>\n
\n\n\n\n\n\n
Product<\/th>\nKit Catalog No.<\/th>\n<\/tr>\n
COD Calibration Standard, 1000 ppm<\/td>\nA-7301<\/a><\/td>\n<\/tr>\n
COD Calibration Standard, 10,000 ppm<\/td>\nA-7310<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Xem th\u00eam v\u1ec1 Test kit \u0111o ch\u1ec9 ti\u00eau COD t\u1ea1i \u0111\u00e2y<\/a>.<\/p>\n

Xem th\u00eam v\u1ec1 c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m kh\u00e1c c\u1ee7a CHEMetrics t\u1ea1i \u0111\u00e2y<\/a>.<\/p>\n

Tegent Scientific Vi\u1ec7t Nam\u00a0l\u00e0 \u0111\u1ea1i di\u1ec7n \u0111\u1ed9c quy\u1ec1n c\u1ee7a Chemetrics (USA) t\u1ea1i Vi\u1ec7t Nam<\/strong><\/em><\/p>\n

H\u00e3y li\u00ean h\u1ec7 \u0111\u1ebfn ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n v\u00e0 h\u1ed7 tr\u1ee3 nhanh nh\u1ea5t.<\/strong><\/p>\n

Email: info@tegent.com.vn<\/strong><\/p>\n

Hotline: 0896164868<\/strong><\/p>\n

Zalo: 0987445016<\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

X\u00c1C \u0110\u1ecaNH COD TRONG N\u01af\u1edaC – CHEMETRICS USA Test kit \u0111o ch\u1ec9 ti\u00eau COD (ch\u1ec9 s\u1ed1 nhu c\u1ea7u oxy h\u00f3a h\u1ecdc – Chemical Oxygen Demand) c\u1ee7a CHEMetrics (M\u1ef9) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 \u00f4 nhi\u1ec5m h\u1eefu c\u01a1 trong n\u01b0\u1edbc th\u1ea3i. \u0110\u00e2y l\u00e0 l\u01b0\u1ee3ng oxy c\u1ea7n thi\u1ebft \u0111\u1ec3 oxy ho\u00e1 c\u00e1c […]<\/p>\n","protected":false},"author":4,"featured_media":1705,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-1709","mona_consumable","type-mona_consumable","status-publish","has-post-thumbnail","hentry","category_consumable-hang-chemetrics-en"],"acf":[],"yoast_head":"\nX\u00c1C \u0110\u1ecaNH COD TRONG N\u01af\u1edaC - CHEMETRICS USA - Tegent<\/title>\n<meta name=\"description\" content=\"X\u00c1C \u0110\u1ecaNH COD TRONG N\u01af\u1edaC - CHEMETRICS USATest kit \u0111o ch\u1ec9 ti\u00eau COD (ch\u1ec9 s\u1ed1 nhu c\u1ea7u oxy h\u00f3a h\u1ecdc - Chemical Oxygen Demand) c\u1ee7a CHEMetrics (M\u1ef9) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 \u00f4 nhi\u1ec5m h\u1eefu c\u01a1 trong n\u01b0\u1edbc th\u1ea3i. 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