The phrase "assay grade" is correct and usable in written English.
It is typically used to describe the quality or purity of a substance, particularly in the context of materials used for testing or analysis.
Example: "The laboratory requires assay grade chemicals to ensure accurate and reliable results in their experiments."
Alternatives: "analytical grade" or "testing grade".
Such factors as histological type, specimen size in steroid-binding assay, grade of malignancy and tumour necrosis were statistically unrelated to agreement or disagreement of receptor assays.
Actinomycin D (>95%% purity), kits for glucose, triglyceride, cholesterol and free fatty acid quantitation (Glucose CII Test Wako, Triglyceride E-test Wako Cholesterol E-test Wako and NEFA C-test Wako), 4-nitrophenol (>99%% purity), 4-nitroaniline (>99%% purity), maltose (>99%% purity), starch (enzyme assay grade) were purchased from Wako Pure Chemical Industries (Osaka, Japan).
To measure the concentrations required to inhibit 50% of cell migration in the chemotaxis assay, graded doses of antagonists were added to a constant concentration of CCL22.
For all assays, pharmaceutical grade heparin (APP Pharmaceuticals) was used for the standard curves.
Prior to the qualitative observation of antiviral assay, a grading system was developed according to Kudi and Myint [ 11].
Furthermore, our preliminary analysis of the burn severity, given by the density of intact skin structures in post-burn histology, suggests that the sensitivity of terahertz radiation to a reduction in the number and size of these structures can be exploited to assay burn grades.
We assigned each assay an arbitrary grade: A (score, ≥ 90%), B (≥ 80%to9090%), C (≥ 70%to8080%), or D (< 70%), with A being the highest-quality assays in terms of reproducibility and D the lowest.
Cetyltrimethylammonium bromide (CTAB, sigma, 99%), Zn OAc 2 · 2H2O (CDH, 99.5%), Na2S · xH2O (CDH, 55 58% assay) all analytical grade have been used as received.
Those previously reported as pathogenic with functional evidence were then sent for confirmatory testing using a diagnostic grade assay.
Results were verified using a diagnostic grade assay in a certified laboratory, and a formal report was issued.
Next, 0.5% (v v-1) tetramethylethylenediamine (TEMED; Fisher Bioreagents, electrophoresis grade, assay 97%) was added to each cuvette, mixed well, and allowed to polymerize at ambient temperature.
