- Separation of Nitrite and Nitrate Ions (NH2P-50 4E)
- Sulfite in Wine (1) (KC-811)
- Sulfite in Wine (3) (KC-811)
- Silicic Acid and Boric Acid (KC-811)
- Arsenic Acid and Arsenious Acid (KC-811)
- Simultaneous Analysis of Carbonic Ion and Seven Common Anions (SI-90 4E)
- Effects of Pretreatment in The Analysis of Mineral Water (SI-90 4E)
- Simultaneous Analysis of Nitrous Acid and Ammonium Thiocyanate According to Japanese Testing Methods for Fertilizers (NH2P-50 4E)
- Separation of Water-Soluble Vitamin and Sulfite (KC-811)