Table 2.
The content of macroelements per 100 g of instant coffee (no declaration: species, degree of roasting, and origin).
| Content Av. (mg/100 g) |
Method of Brewing | Time of Brewing (min) | Coffee (g) | Water (mL) | The Volume of a Cup (mL) | Type of Water | Pressure (Ba) | Temperature of Water (°C) | Methods of Analysis | References |
|---|---|---|---|---|---|---|---|---|---|---|
| Na | ||||||||||
| 7.14 | Pouring water | nd | 6 | 150 | nd | nd | nd | hot | FAAS | [42] |
| 1.70 | Pouring water | nd | 2 | nd | 30 | up dw | nd | hot | HR-CS-FAAS | [23] |
| K | ||||||||||
| 283.99 | Pouring water | nd | 2 | nd | 30 | up dw | nd | hot | HR-CS-FAAS | [23] |
| 50.60 | Pouring water | nd | 6 | 150 | nd | nd | nd | hot | FAAS | [42] |
| Ca | ||||||||||
| 6.96 | Pouring water | nd | 6 | 150 | nd | nd | nd | hot | FAAS | [42] |
| 1.61 | Pouring water | nd | 2 | nd | 30 | up dw | nd | hot | HR-CS-FAAS | [23] |
| Mg | ||||||||||
| 29.09 | Pouring water | nd | 2 | nd | 30 | up dw | nd | hot | HR-CS-FAAS | [23] |
| 6.80 | Pouring water | nd | 6 | 150 | nd | nd | nd | hot | FAAS | [42] |
| P | ||||||||||
| 24.78 | Pouring water | nd | 6 | 150 | nd | nd | nd | hot | FAAS | [42] |
| 7.76 | Pouring water | nd | 2 | nd | 30 | up dw | nd | hot | HR-CS-FAAS | [23] |
Av—average, FAAS—flame atomic absorption spectrometry, HR-CS-FAAS—high resolution continuum source flame atomic absorption spectrometry, nd—no data, up dw—ultrapure distilled water.