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Table 1 Reagents and Materials and their respective analytical purities

From: Pesticides residue analysis in yam from selected markets across Ghana and Belgium: an evaluation of the QUECHERS method

No

Reagent

Purity (%)

Suppliers

1

Acetonitrile

99.9

VWR PRO-LABO

2

Acetone

99.0

ALLtech

3

Water (Milli Q)

100.0

ALLtech

4

Magnesium sulfate anhydrous (MgSo4)

99.5

Thermo Fisher

5

Sodium chloride (NaCl)

99.0

Thermo Fisher

6

Sodiumcitratetribasic dihydrate (C6H2Na3O7 2H2O)

99.0

Thermo Fisher

7

Sodiumhydrogencitrate sesquihydrate (C6H6Na2O7 1.5H2O)

99.0

Thermo Fisher