Potassium dichromate reference solutions

Product / Spectroscopy

The most widely used reference material for absorbance accuracy and linearity, covering wavelengths from 235 to 430 nm and absorbance values up to 3.5 A. Potassium dichromate in 0.001 M perchloric acid is permanently heat sealed into 10 mm UV-quality quartz cells; solutions are prepared from solid potassium dichromate, NIST SRM 935a. A perchloric acid blank cell is supplied with each reference. A 600 mg/l reference is also available for 430 nm, as recommended by the pharmacopoeias.

Product group: Certified reference materials (CRM)
Brand: Starna Scientific

Manufacturer website

Source: manufacturer website (opens in a new tab) · Image: manufacturer website

Order codes and options

17 codes

Potassium dichromate reference solutions order codes and properties
Code	Concentration	Nominal absorbance 235 nm	Nominal absorbance 257 nm	Nominal absorbance 313 nm	Nominal absorbance 350 nm	Nominal absorbance 430 nm	Description
RM-02	20 mg/l	0.246	0.286	0.096	0.214	no value	no value
RM-04	40 mg/l	0.493	0.574	0.193	0.428	no value	no value
RM-06	60 mg/l	0.743	0.865	0.290	0.643	no value	no value
RM-08	80 mg/l	0.994	1.157	0.387	0.858	no value	no value
RM-10	100 mg/l	1.247	1.452	0.484	1.074	no value	no value
RM-12	120 mg/l	1.501	1.749	0.582	1.290	no value	no value
RM-14	140 mg/l	1.758	2.050	0.679	1.506	no value	no value
RM-16	160 mg/l	2.016	2.351	0.777	1.723	no value	no value
RM-18	180 mg/l	2.275	2.655	0.875	1.940	no value	no value
RM-20	200 mg/l	2.536	2.960	0.974	2.157	no value	no value
RM-22	220 mg/l	2.790	3.256	1.071	2.373	no value	no value
RM-24	240 mg/l	3.043	3.552	1.168	2.589	no value	no value
RM-60	600 mg/l	no value	no value	no value	no value	0.954	no value
RM-0204060810	no value	no value	no value	no value	no value	no value	Linearity set 0.09-1.5 A: 20, 40, 60, 80, 100 mg/l + blank cuvette
RM-020406081060	no value	no value	no value	no value	no value	no value	Above set + 600 mg/l (visible-range absorbance accuracy)
RM-121416182224	no value	no value	no value	no value	no value	no value	Linearity set 1.5-3.5 A: 120-240 mg/l + blank cuvette
RM-040812162024	no value	no value	no value	no value	no value	no value	Linearity set 0.19-3.5 A: 40, 80, 120, 160, 200, 240 mg/l + blank cuvette

Technical specifications

Potassium dichromate reference solutions technical specifications
Number of variants	17

Source: starnacells.com (opens in a new tab) · Starna Certified Reference Materials for Spectroscopy 2021, s.4. Values come from the manufacturer and are confirmed at the quotation stage.