Hydrofluoric acid (HF, 48% m/m), Nitric acid, (HNO3, 65% m/m), for the preparation of solution for digestion of soil, were purchased from Hajvery Scientific Store, Lahore-Pakistan originate to Merck, Germany. Certified reference material of each element (1000 mg L−1, Merck, Germany) was employed for instrument calibration after diluting it with HNO3 (2% v/v). Ultrapure water (18 MΩ.cm resistivity) for the dilution of all solutions was prepared by the GenPure water system (Thermo Scientific, USA). All glassware and materials used in the procedure were soaked in Nitric acid (20% v/v) and then exhaustively washed with ultrapure water. Certified reference materials (SRM 2709a) of San Joaquin soil and water (SRM 1640a) were used as a reference.
Genpure water system
Manufactured by Thermo Fisher Scientific
Sourced in United States
The GenPure water system is a laboratory equipment product that purifies water to a high degree of purity. It removes contaminants and produces ultrapure water suitable for a variety of laboratory applications.
Automatically generated - may contain errors
Lab products found in correlation
Hydrofluoric acid, by Merck Group (1 mentions)
Nitric acid, by Merck Group (1 mentions)
Acetonitrile, by Honeywell (1 mentions)
Phosphoric acid, by Honeywell (1 mentions)
Potassium dihydrogen phosphate, by Honeywell (1 mentions)
Diammonium hydrogen phosphate, by Merck Group (1 mentions)
Phosphoric acid, by Merck Group (1 mentions)
3 protocols using genpure water system
1
Soil Digestion Protocol using HF-HNO3
2
Analytical Method Development for Compounds
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ANZ, NFZ reference standard were provided by Schazoo Labs (Pakistan). Acetonitrile (ACN), potassium dihydrogen phosphate (KH 2 PO 4 ), phosphoric acid (H 3 PO 4 , 85%) and triethylamine (TEA) were supplied by Honeywell (USA). All the chemicals and reagents were of analytical grade while GenPure water system (Thermo Scientific, USA) was used to obtain ultrapure water (18 MΩ.cm -1 ).
3
Quantitative Analysis of Multivitamin and Paracetamol
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Paracetamol (PRML), thiamine (B1), and pyridoxal phosphate (B6) working standards were donated by Schazoo Pharmaceutical Laboratories Ltd. (Pakistan). Diammonium hydrogen phosphate and phosphoric acid (85 %) were obtained from Sigma Aldrich, USA. Methanol and acetonitrile were purchased from Merck, Germany. In experimental work, distilled water (18 µS cm -1 ) was used, prepared in our own lab using the GenPure water system (Thermo Scientific, USA). The solvents and chemicals used during analysis were of HPLC grade. Multi drug formulations in tablet form, containing paracetamol, thiamine, and pyridoxal phosphate were collected from the local market shelves (Neuro Bedoxine Plus tablets, each film coated tablet containing: vitamin B1 50 mg, vitamin B6 100 mg, vitamin B12 100 mg, paracetamol 250 mg, Schazoo Pharmaceutical Laboratories, Pakistan) in Lahore, the capital city of Pakistan.
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