1、List of boiler feed water and boiler water quality analyzer：
| Serial No. | Part Number | Name | Items | Pictures |
| 1 | ERUN-ST7 | Laboratory benchtop multi-parameter water quality analyzer | phosphate ions、total alkalinity、total hardness、copper、iron、turbidity、PH、dissolved oxygen、conductivity、total dissolved solids、chlorine ions | 
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| 2 | ERUN-ST-OD380 | Laboratory benchtop infrared spectrophotometer | oil | 
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Note: Analysis parameter items can be flexibly combined and selected according to the customer's own needs.
2、Reagents List of boiler feed water and boiler water quality analyzer：
Serial No. | Name | Specifications | Quantity |
1 | Phenolphthalein indicator solution | 10 g/L，Using ethanol as solvent, 500mL/bottle | 1 |
2 | Methyl orange indicator liquid | 1 g/L，500mL/bottle | 1 |
3 | Methyl red-methylene blue mixed indicator solution | 500mL/bottle | 1 |
4 | Potassium iodate-potassium iodide standard solution | (1mL is equivalent to 1g sulfite), 500mL/bottle | 1 |
5 | Hydrochloric acid solution | （1+1），500mL/bottle | 1 |
6 | Sodium hydroxide | 500g/bottle | 1 |
7 | Starch indicator liquid | 10g/L，500mL/bottle | 1 |
8 | Phosphate reagent | 0.01-10.0/10.0-50.0mg/L，100 times/set | 1 |
9 | Total alkalinity reagent | 0-100/100-1000mg/L，100 times/set | 1 |
10 | Total hardness reagent | 0.1-5.0/5.0-200.0mg/L，100 times/set | 1 |
11 | Copper reagent | 0.02-1.0/1.0-10.0mg/L，100 times/set | 1 |
12 | Iron reagent | 0.0-5.0/5.0-10.0mg/L，50 times/set | 1 |
13 | Chlorine ion reagent | 0.20-100.0mg/L，50 times/set | 1 |
3、Other parts List of boiler feed water and boiler water quality analyzer：
Serial No. | Name | Specifications | Quantity |
1 | Colorimetric tube | Ф25×95mm | 10 |
2 | Cuvette | 50×25×70mm | 2 |
3 | Lens hood | Black | 1 |
4 | Test tube rack | White | 2 |
5 | Pipette gun | Minimum graduation 0.1mL | 1 |
6 | Acid buret | 25mL，white & brown | 1 |
7 | Microburette | 5mL，Seat type, PTFE cock, grade A | 1 |
8 | Erlenmeyer flask | 250mL，Transparent glass | 1 |
9 | Glass measuring cylinder | 100mL，Transparent glass, minimum graduation 1mL | 1 |
10 | Volumetric flask | 1000mL，White high borosilicate | 1 |
11 | Temperature electrode | / | 1 |
12 | PH composite electrode | / | 1 |
13 | Dissolved oxygen electrode | / | 1 |
14 | Conductivity electrode | / | 1 |
15
| Chargers and charging cables | / | 1 |
| 16 | USB cable | / | 1 |
| 17 | Instruction Manual | / | 1 |
| 18 | Product Certificate /Product Warranty Card | / | 1 |
4、Parameters of boiler feed water and boiler water quality analyzer, reagents, and vessels：
Serial No. | Items | Measuring range | Maximum Deviation | GB & Measuring Method |
1 |
phosphate ions | 0.01-50.00mg/L | 0.2 or 5% |
GB/T 6913-2023 Phosphorus molybdenum blue colorimetric method |
2 |
total alkalinity | 0.05-10.00mmol/L | 5%(F.S) | Acid-base titration |
3 | phenolphthalein alkalinity | 0-50mmol/L | / |
4 | relative alkalinity | 0.00-1.00 | / | / |
5 | total hardness | 0.01-5.00mmol/L | 5%(F.S) |
GB/T 6909-2018 Acid Chromium Blue K method |
6 | copper | 0.02-10.00mg/L | 5%(F.S) |
GB/T 13689-2007 Sodium diethyldithiocarbamate spectrophotometry |
7 | iron | 0.00-10.00mg/L | 5%（F.S) |
GB/T 14427-2017 1,10-phenanthroline spectrophotometry |
8 | turbidity | 0.00-400.00FTU | ≤2%(F.S) | GB/T 12151-2005 Formazine turbidity |
9 | PH（25℃） | 0.00-14.00 | ±0.1 | GB/T 6904-2008 Combined electrode method |
10 | dissolved oxygen | 0.00-20.00 mg/L | ±0.2 | GB/T 12157-2022 Oxygen electrode method |
11 | conductivity （25℃） | 0.00 -199.9×103µS/cm | ±1.0% (F.S) | GB/T 6908-2018 Potassium chloride electrode method |
12 | total dissolved solids | 0.0～199.9×103mg/L | ±0.5% (F.S) | GB/T 14415-2007 Solid guide ratio method |
13 | oil | 0.00～900.00mg/L | RSD＜0.6% | GB/T 12152-2007 Infrared photometry |
14 | sulfite | 0.00-100.00mg/L | / | Iodometric method |
15 | chlorine ions | 0.20-100.00mg/L | 5%(F.S) | GB/T 29340-2012 Ammonium thiocyanide titration method |
Note: Analysis parameter items can be flexibly combined and selected according to the customer's own needs.
5、Scopes of boiler feed water and boiler water quality analyzer, reagents, and vessels：
1、Water quality of natural circulation steam boilers and steam-water boilers using external water treatment：
boiler feed water：
turbidity/FTU、total hardness/(mmol/L)、pH(25℃)、conductivity(25℃)/μS/cm)、dissolved oxygen/(mg/L)、oil/(mg/L)、iron/(mg/L)
boiler water：
total alkalinity/(mmol/L)、phenolphthalein alkalinity/(mmol/L)、pH(25℃)、conductivity(25℃)/μS/cm)、total dissolved solids/(mg/L)、phosphate ions/(mg/L)、sulfite/(mg/L)、relative alkalinity
2、Water quality of natural circulation steam boilers and steam-water boilers using in-pot water treatment：
boiler feed water：
turbidity/FTU、total hardness/(mmol/L)、pH(25℃)、oil/(mg/L)、iron/(mg/L)
boiler water：
total alkalinity/(mmol/L)、phenolphthalein alkalinity/(mmol/L)、pH(25℃)、conductivity(25℃)/μS/cm)、total dissolved solids/(mg/L)、phosphate ions/(mg/L)
3、Cross-flow and once-through steam boiler water quality：
boiler feed water：
turbidity/FTU、total hardness/(mmol/L)、pH(25℃)、dissolved oxygen/(mg/L)、oil/(mg/L)、iron/(mg/L) 、total alkalinity/(mmol/L)、phenolphthalein alkalinity/(mmol/L)、conductivity(25℃)/μS/cm) 、total dissolved solids/(mg/L)、phosphate ions/(mg/L)、sulfite/(mg/L)
boiler water：
total alkalinity/(mmol/L)、phenolphthalein alkalinity/(mmol/L)、pH(25℃)、conductivity(25℃)/μS/cm) 、total dissolved solids/(mg/L)、phosphate ions/(mg/L)、sulfite/(mg/L)
4、Back water quality：
total hardness/(mmol/L)、iron/(mg/L)、copper/(mg/L)、oil/(mg/L)
5、Hot water boiler water quality：
make-up water：
total hardness/(mmol/L)、pH(25℃)、turbidity/FTU、iron/(mg/L)、dissolved oxygen/(mg/L)、chlorine ions/(mg/L)
boiler water：
pH(25℃)、phosphate ions/(mg/L)、iron/(mg/L)、oil/(mg/L)、phenolphthalein alkalinity /(mmol/L)、dissolved oxygen/(mg/L)
