User manual HANNA INSTRUMENTS HI 38067

[. . . ] Instruction Manual Range SPECIFICATIONS 0 to 40 mg/L (ppm) as SiO2 0 to 800 mg/L (ppm) as SiO2 Smallest Increment 1 mg/L (ppm) SiO2 in the 0-40 range 40 mg/L (ppm) SiO2 in the 0-800 range Analysis Method Colorimetric Sample Size 5 mL or 0. 25 mL Number of Tests 100 Case Dimensions 235x175x115 mm (9. 2x6. 9x4. 5") Shipping Weight 712. 5 g (25. 1 oz) INSTRUCTIONS READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT 1- Using the plastic pipette, fill each glass vial with 5 mL of sample (up to the mark). 2- Insert one of the vials into the left hand opening of the checker disc. [. . . ] Note: Any damaged or defective item must be returned in its original packing materials. Silicon does not occur free in nature, but rather as silica (SiO2) in crystalline forms, combined with other oxides and metals in a variety of silicates. Silicon is usually reported as silica when rocks, sediments, soil and water are analyzed. Silica is only slightly soluble in water; solubility and form of silica in water depend on pH of water and on the minerals, containing silica, in contact with water. It is important to estimate silica concentration in case of some industrial installation such as steam generation and cooling water systems. By gently squeezing the bottle, add demineralized 10 mL water to the other vial up to the 10 mL mark. Replace the cap, shake and wait for 7 minutes. 10- Remove the cap and insert the reacted sample into the right hand opening of the checker disc. 11- Hold the checker disc so that a light source illuminates the samples from the back of the windows. 12- Keep the checker disc at a distance of 30-40 cm (1216") to match the color. Rotate the disc while looking at the color test windows and stop when you find the color match. CHEMICAL REACTION PRINTED IN ITALY Determination of silica concentration is an adaptation of the ASTM D859 method of the heteropoly blue method. The reaction between silica and reagents causes a blue tint in the sample which is proportional to the silica concentration. 13- Read the value in the result window directly in mg/L (or ppm) of Silica. 14- If concentration of Silica is higher than 40 ppm, perform the test as follows. 15- Prepare the blank as before (steps 1 and 2). x4 ISTR38067 04/00 16- Using the syringe, add 0. 25 mL of sample to the other vial and add demineralized water up to the 10 mL mark. Note: To measure exactly 0. 25 mL of sample with the syringe, push the plunger completely into the syringe and insert the tip into sample. [. . . ] Interferences: phosphate above 50 ppm, sulfide, high dissolved salts concentration, high concentration of iron. REFERENCES Adaptation of the ASTM D859 method of the Heteropoly Blue Method. HEALTH AND SAFETY The chemicals contained in this kit may be hazardous if improperly handled. Read the relevant Health and Safety Data Sheet before performing this test. [. . . ]