Standard solutions for calibration of Laqua Twin meters

nitrate 5000 ppm, nitrate 300 ppm, nitrate 150 ppm, nitrate 2000 ppm, nitrate 30 ppm, pH 4.01 buffer, pH 7.00 buffer, 1413 uS/cm conductivity, 12.9 mS/cm conductivity, sodium 2000 ppm, sodium 150 ppm, potassium 2000 ppm, potassium 150 ppm, calcium 2000 ppm, calcium 150ppm