Buffer concentrate (buffer powder)

Buffer concentrate. Certificate of calibration (pH 1,65; 3,56; 4,01; 6,86; 9,18; 12,43) (is valid in the Russian Federation)
Approval Certificate for measuring instruments (Buffer concentrates, valid only in the Russian Federation)
Buffer concentrate. Certificate of calibration (pH 12.43) (is valid in the Russian Federation)
Buffer concentrate. Certificate of calibration (pH 9.18), (is valid in the Russian Federation)
Buffer concentrate. Certificate of calibration (pH 6.86) (is valid in the Russian Federation)
Buffer concentrate. Certificate of calibration (pH 4.01) (is valid in the Russian Federation)
Buffer concentrate. Certificate of calibration (pH 3.56) (is valid in the Russian Federation)