What is the role of alginate?

generic name: alginate
English Name: Alginic Acid
Chinese alias: potassium alginate English alias: Sodium Alginate
【Properties】 This product is light yellow powder; odorless; almost tasteless.
This product is insoluble in water, methanol, ethanol, acetone, chloroform, dissolved in alkali hydroxide solution.
Identification (1) To about 30mg plus sodium hydroxide solution (0.1 mol / L), 5ml, and shake to dissolve, add
The calcium chloride test solution 1ml, stirring with a glass rod, resulting gelatinous precipitate on the glass rod, stick in.


(2) take about 30mg of this product, add sodium hydroxide solution (0.1 mol / L), 5ml, and shake to dissolve, dilute sulfuric acid, 1ml, namely
Produce gelatinous precipitate.
(3) take about 10mg of this product, add water, 5ml, plus 1% of the new system 1,3 – dihydroxy-naphthyl alcohol solution with hydrochloric acid 5ml 1ml
Shake well, boil for 5 minutes, let cool, transferred to a 60ml separatory funnel, container water 5ml wash, lotion and
Into a separatory funnel, add isopropyl ether 15ml, shaking extraction, points to take the ether layer, while blank control samples
Quality control of the isopropyl ether layer and control tubes, should dramatically deep purple.


[Check acidity to take this product 1.5g, add water 50ml, shake for 5 minutes
Starch to take this product 0.1g, add sodium hydroxide solution (1 → 2500) 100ml, shake to dissolve, to take 5ml, plus
A drop of iodine test solution, not transient blue.
Loss on drying to remove the goods, dried at 105 ℃ 4 hours, less weight loss should not exceed 15.0%
Residue on ignition to take this product 0.5g, left over residue should not exceed 5.0%.
Iron salts to remove the goods 1g, slowly burn to completely carbonized in the 500 ~ 600 ° C ignition to complete ash, salt


3ml of acid, so that the residue dissolved moved into a 50ml volumetric flask, add water to the mark, shake, the precise amount of 5ml set satisfied
S colorimetric tube, add water into a 25ml, such as color, with a standard iron solution
The 5ml made of the control fluid, may not be deeper (0.05%).
Heavy metals residue on ignition, the residue left over from, according to the law to check
Containing heavy metals shall not be more than a million parts per 40.
Arsenic salt to take this product 0.5g, add anhydrous sodium carbonate 0.5g, mix, add water a small amount of moist, low heat and slow


Slow burn to ash and let cool, add a small amount of hydrochloric acid to the residue until no longer produce bubbles, the hydrochloric acid 5ml
Water 23ml to dissolve, arsenic not more than three millionths.
Viscosity at 20 ° C, to remove the goods 1% aqueous solution of sodium hydroxide solution adjusted to neutral with a rotary
Viscometer (Option No. 2 rotor speed 30n/min, or 60n/min) viscosity should be less than 50 x 10 Pa s.
The acid value to take this product 0.5g, accurately weighed, add 50ml of water and calcium acetate solution (0.25mol / L), 30ml, shake,
Place 1 hour, add phenolphthalein indicator solution 5 drops of sodium hydroxide solution (0.1 mol / L), titration, and titration knot


If the blank test correction, calculated as the acid value:
(A-B) × M × 56.1
Acid value = ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
W (1-L)
A: Sample consumption of sodium hydroxide solution (of 0.1mol / L), volume (ml)
B: Blank consumption of sodium hydroxide solution (of 0.1mol / L), volume (ml)
M: the molar concentration of sodium hydroxide solution
W: Sample Weight (g) The
L: Sample Moisture (%)
[Function and use] excipients, adhesives, acid reflux inhibitor.
[Storage] sealed.
Indications


Conducive to the role of the hanging, thickening, emulsifying, gluing, etc.. Available microcapsules capsule material, or as a coating and film-forming materials.
Dosage
(1) When a strong acid acid precipitation of algae;
(2) the safe daily intake of 0.25mg/kg.