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ชื่อสินค้า
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ชุดวัดค่าออกซิเจน |
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Dissolved Oxygen Test Kit) |
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รหัสสินค้า : Code |
DOK-Visual
Kits-K-7512 |
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ผลิตภัณฑ์ใช้วัด |
มาตรฐาน |
การรับประกัน |
เอกสารประกอบ |
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DO |
CE |
ตัวเครื่อง
1 ปี, หัวอ่าน 6 เดือน |
See Instruction Manual |
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Methods
The level of dissolved oxygen in natural waters is often a direct
indication of quality, since aquatic plants produce oxygen, while
microorganisms generally consume it as they feed on pollutants. At low
temperatures the solubility of oxygen is increased; during summer,
saturation levels can be as low as 4 ppm. Dissolved oxygen (D.O.) is
essential for the support of fish and other aquatic life and aids in the
natural decomposition of organic matter. Waste treatment plants that
employ aerobic digestion must maintain a level of at least 2 ppm
dissolved oxygen.
At elevated temperatures, oxygen is highly corrosive to metals, causing
pitting in ferrous systems such as high-pressure boilers and deep well
oil recovery equipment. To prevent costly corrosion damage, the liquids
in contact with the metal surfaces must be treated, usually by a
combination of physical and chemical means. Deaeration can reduce the
dissolved oxygen concentration of boiler feedwater from several ppm to a
few ppb. Chemical reducing agents such as hydrazine, DEHA, or sodium
sulfite, may be used instead of or in conjunction with deaeration.
The Indigo Carmine
Method
References: ASTM D 888-87, Colorimetric Indigo Carmine, Test Method A.
Gilbert, T. W., Behymer, T. D., Castañeda, H. B., Determination of
Dissolved Oxygen in Natural and Wastewaters, American Laboratory,
March 1982, pp. 119-134.
Test kits for environmental and drinking water applications (ppm range)
employ the indigo carmine method. The reduced form of indigo carmine
reacts with D.O. to form a blue product. The indigo carmine methodology
is not subject to interferences from temperature, salinity, or dissolved
gases such as sulfide, which plague users of D.O. meters. Results are
expressed as ppm (mg/L) O2.
The Rhodazine D™
Method
References: Developed by CHEMetrics, Inc. ASTM Power Plant Manual, 1st.
ed. p. 169 (1984). ASTM D 5543-94 (1999), Low Level Dissolved Oxygen in
Water, Test Method A.
Test kits for boiler waters and applications requiring trace levels of
D.O. (ppb range) employ the Rhodazine D methodology. Developed by
CHEMetrics, Inc., and approved by ASTM as the eference method for ppb
D.O. determination, the Rhodazine D compound in reduced form reacts with
dissolved oxygen to form a bright pink reaction product. The method is
not subject to direct temperature, salinity, or dissolved gas
interferences. Oxidizing agents, including benzoquinone, can cause high
results. Reducing agents such as hydrazine and sulfite do not interfere.
Results are expressed as ppm (mg/L) or ppb (mg/L) O2.
Low-range dissolved oxygen test kits include a special sampling tube
(diagram) for use with boiler feedwater. This device allows the user to
break the tip of the ampoule in a flowing sample stream in order to
preclude error from contamination by atmospheric oxygen.
Kit comes in plastic case and
contains everything needed to perform
30 tests : Refill, Comparator, 25 ml sample cup, Instructions and
MSDS
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ชุดวัดค่าออกซิเจนละลายในน้ำ
- วิธีการวัด
Indigo Carmine
- ช่วงการวัด
1 - 12 mg/L
- 1 ชุดวัด
ประกอบด้วย กล่องพลาสติกพร้อมอุปกรณ์หลัก และหลอดน้ำยา ใช้ได้ 30 ครั้ง (K-7512)
**ในกรณีน้ำยาหมดสามารถสั่งซื้อ Refill(รหัสสินค้า
R-7512 บรรจุ 30 หลอด)
เพื่อใช้กับอุปกรณ์หลักได้ (ราคา
Refill 30 tests ราคา 2,875.-
บาท)
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ราคาขาย-Sales Price |
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ราคาขายต่อหน่วย/บาท |
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6,500.00 |
บาท |
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Promotion
Discount 0% |
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0.00 |
บาท |
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ราคาสุทธิ์/บาท
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6,500.00 |
บาืท
(ยังไม่รวม
VAT7%) |
| ***ส่วนลดพิเศษนี้
ทางเราขอสงวนสิทธิ์อาจเปลี่ยนแปลงได้โดยไม่จำเป็นต้องแจ้งล่วงหน้า |
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