序号

No.

指标名称

Specifications

工业级

Tech grade

食品级

Food grade

1

   主含量                       % ≥

  Phosphorus pentoxide

57

57

2

  三聚磷酸钠Na5P3O10             % ≥

  Total content

94

94

3

   铁                         % ≤

   Fe

0.01

0.007

4

  水不溶物                       % ≤

   Water insoluble

0.1

0.05

5

  氯化物  % ≤

  Chloride, as CI

-

0.025

6

  重金属                       % ≤

   Heavy metal, as Pb

-

0.001

7

  砷                           % ≤

  Arsenic, as AS

-

0.0003

8

  1%水溶液PH值

  PH of 1% solution

9.2-10.0

9.5-10.0

9

  氟化物                   % ≤

  Fluoride(F)

-

0.003

10

  硫酸盐                      % ≤

  Sulphate

-

0.4

11

   白度

   Whiteness

90

85