Item

Indicator requirements

Methods

Appearances

White granules or powder

Visual method

Purity，%

≥99

Difference method

Moisture，mg/kg

≤200

Karl Fischer moisture meter method

Acidity（HF），mg/kg

≤200

Acid–base titration（Acetonitrile dissolved samples，Triethylamine-dimethyl carbonate as titration solution，Bromophenol blue as an indicator）

Cl-，mg/kg

≤5

Potentiometric titration（Silver nitrate solution is used as a titrant, potentiometric Sudden jump indication endpoint）

SO4-，mg/kg

≤10

Turbidimetry (Refer to GB/T 19282-2014 Lithium hexafluorophosphate product analysis method) Chapter 3.6

Metal ion，mg/kg（Na/Mg/Al/K/Ca/Ti/Cr/Mn/Fe/Co/Ni/Cu/Zn/Mo/Cd/Ba/Pb）

＜5

ICP-OES（(Refer to GB/T 19282-2014 Test Method for Lithium Hexafluorophosphate) Chapter 3.3